77513240 has 32 divisors (see below), whose sum is σ = 199320480. Its totient is φ = 26575872.

The previous prime is 77513231. The next prime is 77513269. The reversal of 77513240 is 4231577.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 138137 + ... + 138696.

It is an arithmetic number, because the mean of its divisors is an integer number (6228765).

Almost surely, 2^77513240 is an apocalyptic number.

77513240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77513240 is an abundant number, since it is smaller than the sum of its proper divisors (121807240).

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

77513240 is a wasteful number, since it uses less digits than its factorization.

77513240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276851 (or 276847 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 77513240 is about 8804.1603801839. The cubic root of 77513240 is about 426.3752268636.

The spelling of 77513240 in words is "seventy-seven million, five hundred thirteen thousand, two hundred forty".