731974320 has 560 divisors, whose sum is σ = 3200723712. Its totient is φ = 151165440.

The previous prime is 731974283. The next prime is 731974343. The reversal of 731974320 is 23479137.

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 4490559 + ... + 4490721.

Almost surely, 2^731974320 is an apocalyptic number.

731974320 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 731974320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600361856).

731974320 is an abundant number, since it is smaller than the sum of its proper divisors (2468749392).

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

731974320 is a wasteful number, since it uses less digits than its factorization.

731974320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 731974320 is about 27055.0239327190. The cubic root of 731974320 is about 901.2223391230. Note that the first 3 decimals are identical.

The spelling of 731974320 in words is "seven hundred thirty-one million, nine hundred seventy-four thousand, three hundred twenty".