398796651 has 24 divisors (see below), whose sum is σ = 629559216. Its totient is φ = 241251840.

The previous prime is 398796649. The next prime is 398796653. The reversal of 398796651 is 156697893.

It is an interprime number because it is at equal distance from previous prime (398796649) and next prime (398796653).

It is not a de Polignac number, because 398796651 - 2¹ = 398796649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398796653) 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 23 ways as a sum of consecutive naturals, for example, 55311 + ... + 62103.

It is an arithmetic number, because the mean of its divisors is an integer number (26231634).

Almost surely, 2^398796651 is an apocalyptic number.

398796651 is a deficient number, since it is larger than the sum of its proper divisors (230762565).

398796651 is a wasteful number, since it uses less digits than its factorization.

398796651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7403 (or 7400 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 398796651 is about 19969.8936151398. The cubic root of 398796651 is about 736.0666949593.

The spelling of 398796651 in words is "three hundred ninety-eight million, seven hundred ninety-six thousand, six hundred fifty-one".