398888477 has 16 divisors (see below), whose sum is σ = 436201920. Its totient is φ = 362558592.

The previous prime is 398888461. The next prime is 398888509. The reversal of 398888477 is 774888893.

It is a cyclic number.

It is not a de Polignac number, because 398888477 - 2⁴ = 398888461 is a prime.

It is a super-2 number, since 2×398888477² = 318224034166759058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398888177) 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, 354638 + ... + 355760.

It is an arithmetic number, because the mean of its divisors is an integer number (27262620).

Almost surely, 2^398888477 is an apocalyptic number.

It is an amenable number.

398888477 is a deficient number, since it is larger than the sum of its proper divisors (37313443).

398888477 is a wasteful number, since it uses less digits than its factorization.

398888477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its digits is 21676032, while the sum is 62.

The square root of 398888477 is about 19972.1925937039. The cubic root of 398888477 is about 736.1231856320.

The spelling of 398888477 in words is "three hundred ninety-eight million, eight hundred eighty-eight thousand, four hundred seventy-seven".