398753855 has 8 divisors (see below), whose sum is σ = 503689200. Its totient is φ = 302213376.

The previous prime is 398753851. The next prime is 398753863. The reversal of 398753855 is 558357893.

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

It is a cyclic number.

It is not a de Polignac number, because 398753855 - 2² = 398753851 is a prime.

It is a super-2 number, since 2×398753855² = 318009273754722050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 398753797 and 398753806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398753851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2098610 + ... + 2098799.

It is an arithmetic number, because the mean of its divisors is an integer number (62961150).

Almost surely, 2^398753855 is an apocalyptic number.

398753855 is a deficient number, since it is larger than the sum of its proper divisors (104935345).

398753855 is a wasteful number, since it uses less digits than its factorization.

398753855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197433.

The product of its digits is 4536000, while the sum is 53.

The square root of 398753855 is about 19968.8220734224. The cubic root of 398753855 is about 736.0403642157.

The spelling of 398753855 in words is "three hundred ninety-eight million, seven hundred fifty-three thousand, eight hundred fifty-five".