731742881 has 8 divisors (see below), whose sum is σ = 735134400. Its totient is φ = 728358640.

The previous prime is 731742863. The next prime is 731742889. The reversal of 731742881 is 188247137.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-731742881 is a prime.

It is a super-2 number, since 2×731742881² = 1070895287788360322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731742889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315755 + ... + 318063.

It is an arithmetic number, because the mean of its divisors is an integer number (91891800).

Almost surely, 2^731742881 is an apocalyptic number.

It is an amenable number.

731742881 is a deficient number, since it is larger than the sum of its proper divisors (3391519).

731742881 is a wasteful number, since it uses less digits than its factorization.

731742881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639.

The product of its digits is 75264, while the sum is 41.

The square root of 731742881 is about 27050.7464037501. The cubic root of 731742881 is about 901.1273449052.

The spelling of 731742881 in words is "seven hundred thirty-one million, seven hundred forty-two thousand, eight hundred eighty-one".