73731560 has 96 divisors (see below), whose sum is σ = 199704960. Its totient is φ = 23954304.

The previous prime is 73731527. The next prime is 73731563. The reversal of 73731560 is 6513737.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73731563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 689027 + ... + 689133.

It is an arithmetic number, because the mean of its divisors is an integer number (2080260).

Almost surely, 2^73731560 is an apocalyptic number.

73731560 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73731560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99852480).

73731560 is an abundant number, since it is smaller than the sum of its proper divisors (125973400).

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

73731560 is a wasteful number, since it uses less digits than its factorization.

73731560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 73731560 is about 8586.7083332322. The cubic root of 73731560 is about 419.3253719805.

The spelling of 73731560 in words is "seventy-three million, seven hundred thirty-one thousand, five hundred sixty".