28625940 has 96 divisors (see below), whose sum is σ = 101794560. Its totient is φ = 6542208.

The previous prime is 28625939. The next prime is 28625941. The reversal of 28625940 is 4952682.

It is a happy number.

28625940 is a `hidden beast` number, since 2 + 8 + 62 + 594 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28625939) and next prime (28625941).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28625895 and 28625904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28625941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7 + ... + 7566.

It is an arithmetic number, because the mean of its divisors is an integer number (1060360).

Almost surely, 2^28625940 is an apocalyptic number.

28625940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28625940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50897280).

28625940 is an abundant number, since it is smaller than the sum of its proper divisors (73168620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28625940 is a wasteful number, since it uses less digits than its factorization.

28625940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7598 (or 7590 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 28625940 is about 5350.3214856679. The cubic root of 28625940 is about 305.9050070384.

The spelling of 28625940 in words is "twenty-eight million, six hundred twenty-five thousand, nine hundred forty".