87149979240 has 32 divisors (see below), whose sum is σ = 261449938080. Its totient is φ = 23239994432.

The previous prime is 87149979223. The next prime is 87149979251. The reversal of 87149979240 is 4297994178.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 363124794 + ... + 363125033.

It is an arithmetic number, because the mean of its divisors is an integer number (8170310565).

Almost surely, 2^87149979240 is an apocalyptic number.

It is an amenable number.

87149979240 is an abundant number, since it is smaller than the sum of its proper divisors (174299958840).

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

87149979240 is a wasteful number, since it uses less digits than its factorization.

87149979240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726249841 (or 726249837 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 87149979240 in words is "eighty-seven billion, one hundred forty-nine million, nine hundred seventy-nine thousand, two hundred forty".