87779844 has 18 divisors (see below), whose sum is σ = 221888030. Its totient is φ = 29259936.

The previous prime is 87779831. The next prime is 87779863. The reversal of 87779844 is 44897778.

It can be written as a sum of positive squares in only one way, i.e., 86266944 + 1512900 = 9288^2 + 1230^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1219129 + ... + 1219200.

Almost surely, 2^87779844 is an apocalyptic number.

It is an amenable number.

87779844 is an abundant number, since it is smaller than the sum of its proper divisors (134108186).

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

87779844 is a wasteful number, since it uses less digits than its factorization.

87779844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438339 (or 2438334 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 87779844 is about 9369.0898170527. The cubic root of 87779844 is about 444.4247821764.

The spelling of 87779844 in words is "eighty-seven million, seven hundred seventy-nine thousand, eight hundred forty-four".