398925655 has 32 divisors (see below), whose sum is σ = 517881600. Its totient is φ = 293916672.

The previous prime is 398925649. The next prime is 398925661. The reversal of 398925655 is 556529893.

It is an interprime number because it is at equal distance from previous prime (398925649) and next prime (398925661).

It is not a de Polignac number, because 398925655 - 2⁵ = 398925623 is a prime.

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 in 31 ways as a sum of consecutive naturals, for example, 1482861 + ... + 1483129.

It is an arithmetic number, because the mean of its divisors is an integer number (16183800).

Almost surely, 2^398925655 is an apocalyptic number.

398925655 is a deficient number, since it is larger than the sum of its proper divisors (118955945).

398925655 is a wasteful number, since it uses less digits than its factorization.

398925655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603.

The product of its digits is 2916000, while the sum is 52.

The square root of 398925655 is about 19973.1233160966. The cubic root of 398925655 is about 736.1460547957.

The spelling of 398925655 in words is "three hundred ninety-eight million, nine hundred twenty-five thousand, six hundred fifty-five".