73687920 has 40 divisors (see below), whose sum is σ = 228433296. Its totient is φ = 19650048.

The previous prime is 73687903. The next prime is 73687921. The reversal of 73687920 is 2978637.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73687921) by changing a digit.

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, 153277 + ... + 153756.

Almost surely, 2^73687920 is an apocalyptic number.

It is an amenable number.

73687920 is an abundant number, since it is smaller than the sum of its proper divisors (154745376).

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

73687920 is a wasteful number, since it uses less digits than its factorization.

73687920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307049 (or 307043 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 73687920 is about 8584.1668203734. The cubic root of 73687920 is about 419.2426259997.

The spelling of 73687920 in words is "seventy-three million, six hundred eighty-seven thousand, nine hundred twenty".