77265720 has 96 divisors (see below), whose sum is σ = 286996320. Its totient is φ = 17660160.

The previous prime is 77265719. The next prime is 77265739. The reversal of 77265720 is 2756277.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12811 + ... + 17850.

It is an arithmetic number, because the mean of its divisors is an integer number (2989545).

Almost surely, 2^77265720 is an apocalyptic number.

77265720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77265720 is an abundant number, since it is smaller than the sum of its proper divisors (209730600).

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

77265720 is a wasteful number, since it uses less digits than its factorization.

77265720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30685 (or 30678 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 77265720 is about 8790.0921496876. The cubic root of 77265720 is about 425.9209004761.

The spelling of 77265720 in words is "seventy-seven million, two hundred sixty-five thousand, seven hundred twenty".