76720340 has 24 divisors (see below), whose sum is σ = 161634312. Its totient is φ = 30588800.

The previous prime is 76720331. The next prime is 76720361. The reversal of 76720340 is 4302767.

It can be written as a sum of positive squares in 4 ways, for example, as 13454224 + 63266116 = 3668^2 + 7954^2 .

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, 290 + ... + 12390.

It is an arithmetic number, because the mean of its divisors is an integer number (6734763).

Almost surely, 2^76720340 is an apocalyptic number.

It is an amenable number.

76720340 is an abundant number, since it is smaller than the sum of its proper divisors (84913972).

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

76720340 is a wasteful number, since it uses less digits than its factorization.

76720340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12427 (or 12425 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 76720340 is about 8759.0147847803. The cubic root of 76720340 is about 424.9164126272.

The spelling of 76720340 in words is "seventy-six million, seven hundred twenty thousand, three hundred forty".