73139856 has 40 divisors (see below), whose sum is σ = 195463680. Its totient is φ = 23538816.

The previous prime is 73139837. The next prime is 73139879. The reversal of 73139856 is 65893137.

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, 24880 + ... + 27663.

It is an arithmetic number, because the mean of its divisors is an integer number (4886592).

Almost surely, 2^73139856 is an apocalyptic number.

It is an amenable number.

73139856 is an abundant number, since it is smaller than the sum of its proper divisors (122323824).

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

73139856 is a wasteful number, since it uses less digits than its factorization.

73139856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52583 (or 52577 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 73139856 is about 8552.1842823924. The cubic root of 73139856 is about 418.2006469382.

The spelling of 73139856 in words is "seventy-three million, one hundred thirty-nine thousand, eight hundred fifty-six".