87444740 has 12 divisors (see below), whose sum is σ = 183633996. Its totient is φ = 34977888.

The previous prime is 87444697. The next prime is 87444809. The reversal of 87444740 is 4744478.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9193024 + 78251716 = 3032^2 + 8846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87444694 and 87444703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2186099 + ... + 2186138.

It is an arithmetic number, because the mean of its divisors is an integer number (15302833).

Almost surely, 2^87444740 is an apocalyptic number.

It is an amenable number.

87444740 is an abundant number, since it is smaller than the sum of its proper divisors (96189256).

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

87444740 is a wasteful number, since it uses less digits than its factorization.

87444740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372246 (or 4372244 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 38.

The square root of 87444740 is about 9351.1892291836. The cubic root of 87444740 is about 443.8585229517.

The spelling of 87444740 in words is "eighty-seven million, four hundred forty-four thousand, seven hundred forty".