398602655 has 32 divisors (see below), whose sum is σ = 556657920. Its totient is φ = 270789120.

The previous prime is 398602649. The next prime is 398602663. The reversal of 398602655 is 556206893.

It is a happy number.

It is not a de Polignac number, because 398602655 - 2¹² = 398598559 is a prime.

It is a Smith number, since the sum of its digits (44) 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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128432 + ... + 131498.

It is an arithmetic number, because the mean of its divisors is an integer number (17395560).

Almost surely, 2^398602655 is an apocalyptic number.

398602655 is a deficient number, since it is larger than the sum of its proper divisors (158055265).

398602655 is a wasteful number, since it uses less digits than its factorization.

398602655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 398602655 is about 19965.0358126401. The cubic root of 398602655 is about 735.9473215438.

The spelling of 398602655 in words is "three hundred ninety-eight million, six hundred two thousand, six hundred fifty-five".