28807152 has 40 divisors (see below), whose sum is σ = 81185280. Its totient is φ = 8729280.

The previous prime is 28807151. The next prime is 28807183. The reversal of 28807152 is 25170882.

It is a super-2 number, since 2×28807152² = 1659704012702208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28807151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26752 + ... + 27807.

It is an arithmetic number, because the mean of its divisors is an integer number (2029632).

Almost surely, 2^28807152 is an apocalyptic number.

28807152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28807152 is an abundant number, since it is smaller than the sum of its proper divisors (52378128).

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

28807152 is a wasteful number, since it uses less digits than its factorization.

28807152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54581 (or 54575 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 28807152 is about 5367.2294528928. The cubic root of 28807152 is about 306.5491442141.

The spelling of 28807152 in words is "twenty-eight million, eight hundred seven thousand, one hundred fifty-two".