731402040 has 64 divisors (see below), whose sum is σ = 2269879200. Its totient is φ = 188314112.

The previous prime is 731402029. The next prime is 731402053. The reversal of 731402040 is 40204137.

731402040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 731401998 and 731402016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101607 + ... + 108566.

Almost surely, 2^731402040 is an apocalyptic number.

It is an amenable number.

731402040 is an abundant number, since it is smaller than the sum of its proper divisors (1538477160).

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

731402040 is a wasteful number, since it uses less digits than its factorization.

731402040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210216 (or 210212 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 731402040 is about 27044.4456404638. The cubic root of 731402040 is about 900.9874101213.

Adding to 731402040 its reverse (40204137), we get a palindrome (771606177).

The spelling of 731402040 in words is "seven hundred thirty-one million, four hundred two thousand, forty".