87196640 has 24 divisors (see below), whose sum is σ = 206002440. Its totient is φ = 34878592.

The previous prime is 87196639. The next prime is 87196651. The reversal of 87196640 is 4669178.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272330 + ... + 272649.

It is an arithmetic number, because the mean of its divisors is an integer number (8583435).

Almost surely, 2^87196640 is an apocalyptic number.

87196640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87196640 is an abundant number, since it is smaller than the sum of its proper divisors (118805800).

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

87196640 is a wasteful number, since it uses less digits than its factorization.

87196640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544994 (or 544986 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 87196640 is about 9337.9141139764. The cubic root of 87196640 is about 443.4383505086.

The spelling of 87196640 in words is "eighty-seven million, one hundred ninety-six thousand, six hundred forty".