87258644 has 24 divisors (see below), whose sum is σ = 167269536. Its totient is φ = 39500000.

The previous prime is 87258641. The next prime is 87258673. The reversal of 87258644 is 44685278.

It is a super-2 number, since 2×87258644² = 15228141905437472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 87258595 and 87258604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87258641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7094 + ... + 14994.

It is an arithmetic number, because the mean of its divisors is an integer number (6969564).

Almost surely, 2^87258644 is an apocalyptic number.

It is an amenable number.

87258644 is a deficient number, since it is larger than the sum of its proper divisors (80010892).

87258644 is a wasteful number, since it uses less digits than its factorization.

87258644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167 (or 8165 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 87258644 is about 9341.2335373868. The cubic root of 87258644 is about 443.5434326807.

The spelling of 87258644 in words is "eighty-seven million, two hundred fifty-eight thousand, six hundred forty-four".