73720828 has 6 divisors (see below), whose sum is σ = 129011456. Its totient is φ = 36860412.

The previous prime is 73720811. The next prime is 73720841. The reversal of 73720828 is 82802737.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9215100 + ... + 9215107.

Almost surely, 2^73720828 is an apocalyptic number.

It is an amenable number.

73720828 is a deficient number, since it is larger than the sum of its proper divisors (55290628).

73720828 is a wasteful number, since it uses less digits than its factorization.

73720828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18430211 (or 18430209 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 73720828 is about 8586.0833911627. The cubic root of 73720828 is about 419.3050260199.

The spelling of 73720828 in words is "seventy-three million, seven hundred twenty thousand, eight hundred twenty-eight".