721074346 has 16 divisors (see below), whose sum is σ = 1147051584. Its totient is φ = 338791104.

The previous prime is 721074331. The next prime is 721074371. The reversal of 721074346 is 643470127.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5371 + ... + 38353.

It is an arithmetic number, because the mean of its divisors is an integer number (71690724).

Almost surely, 2^721074346 is an apocalyptic number.

721074346 is a deficient number, since it is larger than the sum of its proper divisors (425977238).

721074346 is a wasteful number, since it uses less digits than its factorization.

721074346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33645.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 721074346 is about 26852.8275233727. The cubic root of 721074346 is about 896.7265221411.

The spelling of 721074346 in words is "seven hundred twenty-one million, seventy-four thousand, three hundred forty-six".