87981044 has 12 divisors (see below), whose sum is σ = 154040964. Its totient is φ = 43969344.

The previous prime is 87981013. The next prime is 87981059. The reversal of 87981044 is 44018978.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49168144 + 38812900 = 7012^2 + 6230^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87980992 and 87981010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7472 + ... + 15224.

It is an arithmetic number, because the mean of its divisors is an integer number (12836747).

Almost surely, 2^87981044 is an apocalyptic number.

It is an amenable number.

87981044 is a deficient number, since it is larger than the sum of its proper divisors (66059920).

87981044 is a wasteful number, since it uses less digits than its factorization.

87981044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10594 (or 10592 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 87981044 is about 9379.8211070361. The cubic root of 87981044 is about 444.7640781184.

The spelling of 87981044 in words is "eighty-seven million, nine hundred eighty-one thousand, forty-four".