73491920 has 40 divisors (see below), whose sum is σ = 174102696. Its totient is φ = 28840448.

The previous prime is 73491919. The next prime is 73491937. The reversal of 73491920 is 2919437.

It can be written as a sum of positive squares in 4 ways, for example, as 1784896 + 71707024 = 1336^2 + 8468^2 .

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 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, 4427 + ... + 12906.

Almost surely, 2^73491920 is an apocalyptic number.

It is an amenable number.

73491920 is an abundant number, since it is smaller than the sum of its proper divisors (100610776).

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

73491920 is a wasteful number, since it uses less digits than its factorization.

73491920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17399 (or 17393 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 73491920 is about 8572.7428516199. The cubic root of 73491920 is about 418.8705861970.

The spelling of 73491920 in words is "seventy-three million, four hundred ninety-one thousand, nine hundred twenty".