1407732728 has 16 divisors (see below), whose sum is σ = 2646696480. Its totient is φ = 701947008.

The previous prime is 1407732727. The next prime is 1407732731. The reversal of 1407732728 is 8272377041.

It is a super-2 number, since 2×1407732728² = 3963422866964643968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1407732727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236801 + ... + 242672.

It is an arithmetic number, because the mean of its divisors is an integer number (165418530).

Almost surely, 2^1407732728 is an apocalyptic number.

It is an amenable number.

1407732728 is a deficient number, since it is larger than the sum of its proper divisors (1238963752).

1407732728 is a wasteful number, since it uses less digits than its factorization.

1407732728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479846 (or 479842 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 1407732728 is about 37519.7644981948. The cubic root of 1407732728 is about 1120.7448085834.

The spelling of 1407732728 in words is "one billion, four hundred seven million, seven hundred thirty-two thousand, seven hundred twenty-eight".