87252440 has 32 divisors (see below), whose sum is σ = 214166160. Its totient is φ = 31728000.

The previous prime is 87252421. The next prime is 87252457. The reversal of 87252440 is 4425278.

It is a super-2 number, since 2×87252440² = 15225976571907200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87252397 and 87252406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98711 + ... + 99590.

Almost surely, 2^87252440 is an apocalyptic number.

It is an amenable number.

87252440 is an abundant number, since it is smaller than the sum of its proper divisors (126913720).

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

87252440 is a wasteful number, since it uses less digits than its factorization.

87252440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198323 (or 198319 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 87252440 is about 9340.9014554271. The cubic root of 87252440 is about 443.5329206040.

The spelling of 87252440 in words is "eighty-seven million, two hundred fifty-two thousand, four hundred forty".