78587240 has 32 divisors (see below), whose sum is σ = 177736680. Its totient is φ = 31272192.

The previous prime is 78587237. The next prime is 78587269. The reversal of 78587240 is 4278587.

It can be written as a sum of positive squares in 4 ways, for example, as 68989636 + 9597604 = 8306^2 + 3098^2 .

It is an unprimeable number.

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, 2894 + ... + 12866.

Almost surely, 2^78587240 is an apocalyptic number.

It is an amenable number.

78587240 is an abundant number, since it is smaller than the sum of its proper divisors (99149440).

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

78587240 is a wasteful number, since it uses less digits than its factorization.

78587240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10181 (or 10177 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 78587240 is about 8864.9444442704. The cubic root of 78587240 is about 428.3354432043.

The spelling of 78587240 in words is "seventy-eight million, five hundred eighty-seven thousand, two hundred forty".