87140636 has 12 divisors (see below), whose sum is σ = 166359480. Its totient is φ = 39609360.

The previous prime is 87140567. The next prime is 87140653. The reversal of 87140636 is 63604178.

It is a junction number, because it is equal to n+sod(n) for n = 87140596 and 87140605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990191 + ... + 990278.

It is an arithmetic number, because the mean of its divisors is an integer number (13863290).

Almost surely, 2^87140636 is an apocalyptic number.

It is an amenable number.

87140636 is a deficient number, since it is larger than the sum of its proper divisors (79218844).

87140636 is a wasteful number, since it uses less digits than its factorization.

87140636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980484 (or 1980482 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 87140636 is about 9334.9148898102. The cubic root of 87140636 is about 443.3433940971.

The spelling of 87140636 in words is "eighty-seven million, one hundred forty thousand, six hundred thirty-six".