73977680 has 40 divisors (see below), whose sum is σ = 196570752. Its totient is φ = 25363584.

The previous prime is 73977679. The next prime is 73977737. The reversal of 73977680 is 8677937.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65492 + ... + 66611.

Almost surely, 2^73977680 is an apocalyptic number.

73977680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

73977680 is an abundant number, since it is smaller than the sum of its proper divisors (122593072).

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

73977680 is a wasteful number, since it uses less digits than its factorization.

73977680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132123 (or 132117 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 73977680 is about 8601.0278455543. The cubic root of 73977680 is about 419.7914308346.

The spelling of 73977680 in words is "seventy-three million, nine hundred seventy-seven thousand, six hundred eighty".