87749028 has 24 divisors (see below), whose sum is σ = 227497760. Its totient is φ = 29249640.

The previous prime is 87749023. The next prime is 87749063. The reversal of 87749028 is 82094778.

It is not an unprimeable number, because it can be changed into a prime (87749021) 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, 406138 + ... + 406353.

Almost surely, 2^87749028 is an apocalyptic number.

It is an amenable number.

87749028 is an abundant number, since it is smaller than the sum of its proper divisors (139748732).

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

87749028 is a wasteful number, since it uses less digits than its factorization.

87749028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812504 (or 812496 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 87749028 is about 9367.4451159321. The cubic root of 87749028 is about 444.3727694880.

The spelling of 87749028 in words is "eighty-seven million, seven hundred forty-nine thousand, twenty-eight".