77312040 has 64 divisors (see below), whose sum is σ = 249782400. Its totient is φ = 19030272.

The previous prime is 77312029. The next prime is 77312051. The reversal of 77312040 is 4021377.

It is an interprime number because it is at equal distance from previous prime (77312029) and next prime (77312051).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 77312040.

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 15 ways as a sum of consecutive naturals, for example, 23220 + ... + 26339.

It is an arithmetic number, because the mean of its divisors is an integer number (3902850).

Almost surely, 2^77312040 is an apocalyptic number.

It is an amenable number.

77312040 is an abundant number, since it is smaller than the sum of its proper divisors (172470360).

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

77312040 is a wasteful number, since it uses less digits than its factorization.

77312040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49586 (or 49582 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 77312040 is about 8792.7265395894. The cubic root of 77312040 is about 426.0059951988.

The spelling of 77312040 in words is "seventy-seven million, three hundred twelve thousand, forty".