398361537 has 64 divisors (see below), whose sum is σ = 694003200. Its totient is φ = 221149440.

The previous prime is 398361533. The next prime is 398361539. The reversal of 398361537 is 735163893.

398361537 is a `hidden beast` number, since 39 + 83 + 6 + 1 + 537 = 666.

It is not a de Polignac number, because 398361537 - 2² = 398361533 is a prime.

It is a super-2 number, since 2×398361537² = 317383828322004738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 398361492 and 398361501.

It is not an unprimeable number, because it can be changed into a prime (398361533) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1256503 + ... + 1256819.

It is an arithmetic number, because the mean of its divisors is an integer number (10843800).

Almost surely, 2^398361537 is an apocalyptic number.

It is an amenable number.

398361537 is a deficient number, since it is larger than the sum of its proper divisors (295641663).

398361537 is a wasteful number, since it uses less digits than its factorization.

398361537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 497 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 398361537 is about 19958.9963926045. The cubic root of 398361537 is about 735.7988980980.

The spelling of 398361537 in words is "three hundred ninety-eight million, three hundred sixty-one thousand, five hundred thirty-seven".