76387720 has 32 divisors (see below), whose sum is σ = 177419520. Its totient is φ = 29568960.

The previous prime is 76387709. The next prime is 76387741. The reversal of 76387720 is 2778367.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 29562 + ... + 32041.

It is an arithmetic number, because the mean of its divisors is an integer number (5544360).

Almost surely, 2^76387720 is an apocalyptic number.

It is an amenable number.

76387720 is an abundant number, since it is smaller than the sum of its proper divisors (101031800).

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

76387720 is a wasteful number, since it uses less digits than its factorization.

76387720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61645 (or 61641 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 76387720 is about 8740.0068649859. The cubic root of 76387720 is about 424.3014499217.

The spelling of 76387720 in words is "seventy-six million, three hundred eighty-seven thousand, seven hundred twenty".