87700440 has 32 divisors (see below), whose sum is σ = 263101680. Its totient is φ = 23386752.

The previous prime is 87700427. The next prime is 87700453. The reversal of 87700440 is 4400778.

It is an interprime number because it is at equal distance from previous prime (87700427) and next prime (87700453).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 87700398 and 87700407.

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, 365299 + ... + 365538.

Almost surely, 2^87700440 is an apocalyptic number.

It is an amenable number.

87700440 is an abundant number, since it is smaller than the sum of its proper divisors (175401240).

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

87700440 is a wasteful number, since it uses less digits than its factorization.

87700440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730851 (or 730847 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 87700440 is about 9364.8513068815. The cubic root of 87700440 is about 444.2907356430.

The spelling of 87700440 in words is "eighty-seven million, seven hundred thousand, four hundred forty".