398669051 has 8 divisors (see below), whose sum is σ = 453821184. Its totient is φ = 346668520.

The previous prime is 398669009. The next prime is 398669059. The reversal of 398669051 is 150966893.

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

It is not a de Polignac number, because 398669051 - 2²² = 394474747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398668987 and 398669005.

It is not an unprimeable number, because it can be changed into a prime (398669059) 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, 787631 + ... + 788136.

It is an arithmetic number, because the mean of its divisors is an integer number (56727648).

Almost surely, 2^398669051 is an apocalyptic number.

398669051 is a deficient number, since it is larger than the sum of its proper divisors (55152133).

398669051 is a wasteful number, since it uses less digits than its factorization.

398669051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575801.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 398669051 is about 19966.6985503363. The cubic root of 398669051 is about 735.9881819887.

It can be divided in two parts, 3986 and 69051, that added together give a palindrome (73037).

The spelling of 398669051 in words is "three hundred ninety-eight million, six hundred sixty-nine thousand, fifty-one".