731324560 has 40 divisors (see below), whose sum is σ = 1774261440. Its totient is φ = 279810432.

The previous prime is 731324543. The next prime is 731324579. The reversal of 731324560 is 65423137.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×731324560² = 1069671224118387200, which contains 22 as substring.

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, 196890 + ... + 200569.

It is an arithmetic number, because the mean of its divisors is an integer number (44356536).

Almost surely, 2^731324560 is an apocalyptic number.

It is an amenable number.

731324560 is an abundant number, since it is smaller than the sum of its proper divisors (1042936880).

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

731324560 is a wasteful number, since it uses less digits than its factorization.

731324560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397495 (or 397489 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 731324560 is about 27043.0131457277. The cubic root of 731324560 is about 900.9555940721.

Adding to 731324560 its reverse (65423137), we get a palindrome (796747697).

The spelling of 731324560 in words is "seven hundred thirty-one million, three hundred twenty-four thousand, five hundred sixty".