721360406 has 8 divisors (see below), whose sum is σ = 1165274544. Its totient is φ = 332935560.

The previous prime is 721360363. The next prime is 721360411. The reversal of 721360406 is 604063127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 13872290 + ... + 13872341.

It is an arithmetic number, because the mean of its divisors is an integer number (145659318).

Almost surely, 2^721360406 is an apocalyptic number.

721360406 is a deficient number, since it is larger than the sum of its proper divisors (443914138).

721360406 is a wasteful number, since it uses less digits than its factorization.

721360406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27744646.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 721360406 is about 26858.1534361542. The cubic root of 721360406 is about 896.8450876660.

The spelling of 721360406 in words is "seven hundred twenty-one million, three hundred sixty thousand, four hundred six".