720404158 has 4 divisors (see below), whose sum is σ = 1080606240. Its totient is φ = 360202078.

The previous prime is 720404147. The next prime is 720404161. The reversal of 720404158 is 851404027.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180101038 + ... + 180101041.

It is an arithmetic number, because the mean of its divisors is an integer number (270151560).

Almost surely, 2^720404158 is an apocalyptic number.

720404158 is a deficient number, since it is larger than the sum of its proper divisors (360202082).

720404158 is a wasteful number, since it uses less digits than its factorization.

720404158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360202081.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 720404158 is about 26840.3457131237. The cubic root of 720404158 is about 896.4486212366.

The spelling of 720404158 in words is "seven hundred twenty million, four hundred four thousand, one hundred fifty-eight".