398807422669 has 16 divisors (see below), whose sum is σ = 455332510080. Its totient is φ = 346919984640.

The previous prime is 398807422621. The next prime is 398807422687. The reversal of 398807422669 is 966224708893.

It is not a de Polignac number, because 398807422669 - 2³¹ = 396659939021 is a prime.

It is a super-2 number, since 2×398807422669² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398807422669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (392807422669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15044049 + ... + 15070534.

It is an arithmetic number, because the mean of its divisors is an integer number (28458281880).

Almost surely, 2^398807422669 is an apocalyptic number.

It is an amenable number.

398807422669 is a deficient number, since it is larger than the sum of its proper divisors (56525087411).

398807422669 is a wasteful number, since it uses less digits than its factorization.

398807422669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30114660.

The product of its (nonzero) digits is 62705664, while the sum is 64.

The spelling of 398807422669 in words is "three hundred ninety-eight billion, eight hundred seven million, four hundred twenty-two thousand, six hundred sixty-nine".