398635794 has 12 divisors (see below), whose sum is σ = 863710926. Its totient is φ = 132878592.

The previous prime is 398635777. The next prime is 398635799. The reversal of 398635794 is 497536893.

398635794 is a `hidden beast` number, since 3 + 9 + 8 + 63 + 579 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 213539769 + 185096025 = 14613^2 + 13605^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 398635794.

It is not an unprimeable number, because it can be changed into a prime (398635799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11073199 + ... + 11073234.

Almost surely, 2^398635794 is an apocalyptic number.

398635794 is an abundant number, since it is smaller than the sum of its proper divisors (465075132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398635794 is a wasteful number, since it uses less digits than its factorization.

398635794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22146441 (or 22146438 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 398635794 is about 19965.8657212754. The cubic root of 398635794 is about 735.9677160244.

The spelling of 398635794 in words is "three hundred ninety-eight million, six hundred thirty-five thousand, seven hundred ninety-four".