731491488 has 432 divisors, whose sum is σ = 2733756480. Its totient is φ = 181149696.

The previous prime is 731491441. The next prime is 731491543. The reversal of 731491488 is 884194137.

It is a happy number.

731491488 is a `hidden beast` number, since 73 + 14 + 91 + 488 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6473320 + ... + 6473432.

It is an arithmetic number, because the mean of its divisors is an integer number (6328140).

Almost surely, 2^731491488 is an apocalyptic number.

731491488 is a gapful number since it is divisible by the number (78) 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 731491488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1366878240).

731491488 is an abundant number, since it is smaller than the sum of its proper divisors (2002264992).

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

731491488 is a wasteful number, since it uses less digits than its factorization.

731491488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 157 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 731491488 is about 27046.0993121004. The cubic root of 731491488 is about 901.0241378635.

The spelling of 731491488 in words is "seven hundred thirty-one million, four hundred ninety-one thousand, four hundred eighty-eight".