87653644 has 48 divisors (see below), whose sum is σ = 174650112. Its totient is φ = 38187072.

The previous prime is 87653641. The next prime is 87653653. The reversal of 87653644 is 44635678.

It is a super-2 number, since 2×87653644² = 15366322612957472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 87653644.

It is not an unprimeable number, because it can be changed into a prime (87653641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98827 + ... + 99709.

It is an arithmetic number, because the mean of its divisors is an integer number (3638544).

Almost surely, 2^87653644 is an apocalyptic number.

It is an amenable number.

87653644 is a deficient number, since it is larger than the sum of its proper divisors (86996468).

87653644 is a wasteful number, since it uses less digits than its factorization.

87653644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 1004 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 87653644 is about 9362.3524821489. The cubic root of 87653644 is about 444.2116986837.

The spelling of 87653644 in words is "eighty-seven million, six hundred fifty-three thousand, six hundred forty-four".