398854707 has 32 divisors (see below), whose sum is σ = 586629120. Its totient is φ = 239928480.

The previous prime is 398854693. The next prime is 398854721. The reversal of 398854707 is 707458893.

It is an interprime number because it is at equal distance from previous prime (398854693) and next prime (398854721).

It is not a de Polignac number, because 398854707 - 2⁷ = 398854579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398854707.

It is not an unprimeable number, because it can be changed into a prime (398850707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401982 + ... + 402972.

It is an arithmetic number, because the mean of its divisors is an integer number (18332160).

Almost surely, 2^398854707 is an apocalyptic number.

398854707 is a deficient number, since it is larger than the sum of its proper divisors (187774413).

398854707 is a wasteful number, since it uses less digits than its factorization.

398854707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 398854707 is about 19971.3471503552. The cubic root of 398854707 is about 736.1024115870.

The spelling of 398854707 in words is "three hundred ninety-eight million, eight hundred fifty-four thousand, seven hundred seven".