76645040 has 20 divisors (see below), whose sum is σ = 178199904. Its totient is φ = 30657984.

The previous prime is 76645021. The next prime is 76645043. The reversal of 76645040 is 4054667.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 76644988 and 76645006.

It is not an unprimeable number, because it can be changed into a prime (76645043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478952 + ... + 479111.

Almost surely, 2^76645040 is an apocalyptic number.

It is an amenable number.

76645040 is an abundant number, since it is smaller than the sum of its proper divisors (101554864).

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

76645040 is a wasteful number, since it uses less digits than its factorization.

76645040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958076 (or 958070 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 76645040 is about 8754.7153009107. The cubic root of 76645040 is about 424.7773505065. Note that the first 3 decimals are identical.

The spelling of 76645040 in words is "seventy-six million, six hundred forty-five thousand, forty".