76451640 has 32 divisors (see below), whose sum is σ = 229355280. Its totient is φ = 20387072.

The previous prime is 76451633. The next prime is 76451651. The reversal of 76451640 is 4615467.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318429 + ... + 318668.

Almost surely, 2^76451640 is an apocalyptic number.

It is an amenable number.

76451640 is an abundant number, since it is smaller than the sum of its proper divisors (152903640).

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

76451640 is a wasteful number, since it uses less digits than its factorization.

76451640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637111 (or 637107 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 76451640 is about 8743.6628480289. The cubic root of 76451640 is about 424.4197664403.

The spelling of 76451640 in words is "seventy-six million, four hundred fifty-one thousand, six hundred forty".