87640052 has 6 divisors (see below), whose sum is σ = 153370098. Its totient is φ = 43820024.

The previous prime is 87640037. The next prime is 87640067. The reversal of 87640052 is 25004678.

It is an interprime number because it is at equal distance from previous prime (87640037) and next prime (87640067).

It can be written as a sum of positive squares in only one way, i.e., 54967396 + 32672656 = 7414^2 + 5716^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10955003 + ... + 10955010.

It is an arithmetic number, because the mean of its divisors is an integer number (25561683).

Almost surely, 2^87640052 is an apocalyptic number.

It is an amenable number.

87640052 is a deficient number, since it is larger than the sum of its proper divisors (65730046).

87640052 is a wasteful number, since it uses less digits than its factorization.

87640052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21910017 (or 21910015 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 87640052 is about 9361.6265680703. The cubic root of 87640052 is about 444.1887369553.

The spelling of 87640052 in words is "eighty-seven million, six hundred forty thousand, fifty-two".