87405544 has 32 divisors (see below), whose sum is σ = 170726400. Its totient is φ = 41912640.

The previous prime is 87405499. The next prime is 87405547. The reversal of 87405544 is 44550478.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (87405547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18937 + ... + 23095.

It is an arithmetic number, because the mean of its divisors is an integer number (5335200).

Almost surely, 2^87405544 is an apocalyptic number.

It is an amenable number.

87405544 is a deficient number, since it is larger than the sum of its proper divisors (83320856).

87405544 is a wasteful number, since it uses less digits than its factorization.

87405544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273 (or 4269 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 87405544 is about 9349.0932180613. The cubic root of 87405544 is about 443.7921950487.

The spelling of 87405544 in words is "eighty-seven million, four hundred five thousand, five hundred forty-four".