87257772 has 36 divisors (see below), whose sum is σ = 252078736. Its totient is φ = 24930720.

The previous prime is 87257767. The next prime is 87257773. The reversal of 87257772 is 27775278.

It is a happy number.

87257772 is a `hidden beast` number, since 8 + 7 + 2 + 577 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×87257772² = 15227837548807968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87257773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172879 + ... + 173382.

Almost surely, 2^87257772 is an apocalyptic number.

It is an amenable number.

87257772 is an abundant number, since it is smaller than the sum of its proper divisors (164820964).

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

87257772 is a wasteful number, since it uses less digits than its factorization.

87257772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346278 (or 346273 counting only the distinct ones).

The product of its digits is 384160, while the sum is 45.

The square root of 87257772 is about 9341.1868624924. The cubic root of 87257772 is about 443.5419551913.

The spelling of 87257772 in words is "eighty-seven million, two hundred fifty-seven thousand, seven hundred seventy-two".