720878938 has 8 divisors (see below), whose sum is σ = 1164496788. Its totient is φ = 332713344.

The previous prime is 720878923. The next prime is 720878941. The reversal of 720878938 is 839878027.

It can be written as a sum of positive squares in 2 ways, for example, as 708997129 + 11881809 = 26627^2 + 3447^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13863031 + ... + 13863082.

Almost surely, 2^720878938 is an apocalyptic number.

720878938 is a deficient number, since it is larger than the sum of its proper divisors (443617850).

720878938 is a wasteful number, since it uses less digits than its factorization.

720878938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27726128.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The square root of 720878938 is about 26849.1887773169. The cubic root of 720878938 is about 896.6455118318.

The spelling of 720878938 in words is "seven hundred twenty million, eight hundred seventy-eight thousand, nine hundred thirty-eight".