28887040 has 192 divisors, whose sum is σ = 88058880. Its totient is φ = 8847360.

The previous prime is 28887037. The next prime is 28887041. The reversal of 28887040 is 4078882.

It is a super-2 number, since 2×28887040² = 1668922159923200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28887041) 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, 931825 + ... + 931855.

It is an arithmetic number, because the mean of its divisors is an integer number (458640).

Almost surely, 2^28887040 is an apocalyptic number.

28887040 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 28887040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44029440).

28887040 is an abundant number, since it is smaller than the sum of its proper divisors (59171840).

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

28887040 is a wasteful number, since it uses less digits than its factorization.

28887040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28887040 is about 5374.6665012817. Note that the first 3 decimals coincide. The cubic root of 28887040 is about 306.8322567164.

The spelling of 28887040 in words is "twenty-eight million, eight hundred eighty-seven thousand, forty".