87391400 has 24 divisors (see below), whose sum is σ = 203185470. Its totient is φ = 34956480.

The previous prime is 87391399. The next prime is 87391411. The reversal of 87391400 is 419378.

It can be written as a sum of positive squares in 3 ways, for example, as 85414564 + 1976836 = 9242^2 + 1406^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218279 + ... + 218678.

Almost surely, 2^87391400 is an apocalyptic number.

It is an amenable number.

87391400 is an abundant number, since it is smaller than the sum of its proper divisors (115794070).

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

87391400 is a wasteful number, since it uses less digits than its factorization.

87391400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436973 (or 436964 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 87391400 is about 9348.3367504599. The cubic root of 87391400 is about 443.7682555473.

The spelling of 87391400 in words is "eighty-seven million, three hundred ninety-one thousand, four hundred".