731133040 has 40 divisors (see below), whose sum is σ = 1854421488. Its totient is φ = 265866240.

The previous prime is 731133019. The next prime is 731133089. The reversal of 731133040 is 40331137.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414537 + ... + 416296.

Almost surely, 2^731133040 is an apocalyptic number.

It is an amenable number.

731133040 is an abundant number, since it is smaller than the sum of its proper divisors (1123288448).

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

731133040 is a wasteful number, since it uses less digits than its factorization.

731133040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830857 (or 830851 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 731133040 is about 27039.4718883339. The cubic root of 731133040 is about 900.8769394913.

Adding to 731133040 its reverse (40331137), we get a palindrome (771464177).

The spelling of 731133040 in words is "seven hundred thirty-one million, one hundred thirty-three thousand, forty".