28625340 has 48 divisors (see below), whose sum is σ = 83639808. Its totient is φ = 7301184.

The previous prime is 28625327. The next prime is 28625341. The reversal of 28625340 is 4352682.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28625298 and 28625307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28625341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8992 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (1742496).

Almost surely, 2^28625340 is an apocalyptic number.

28625340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28625340 is an abundant number, since it is smaller than the sum of its proper divisors (55014468).

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

28625340 is a wasteful number, since it uses less digits than its factorization.

28625340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778 (or 20776 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28625340 is about 5350.2654139771. The cubic root of 28625340 is about 305.9028697661.

The spelling of 28625340 in words is "twenty-eight million, six hundred twenty-five thousand, three hundred forty".