398136040 has 16 divisors (see below), whose sum is σ = 895806180. Its totient is φ = 159254400.

The previous prime is 398136019. The next prime is 398136083. The reversal of 398136040 is 40631893.

It can be written as a sum of positive squares in 2 ways, for example, as 395452996 + 2683044 = 19886^2 + 1638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 398135987 and 398136005.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4976661 + ... + 4976740.

Almost surely, 2^398136040 is an apocalyptic number.

It is an amenable number.

398136040 is an abundant number, since it is smaller than the sum of its proper divisors (497670140).

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

398136040 is a wasteful number, since it uses less digits than its factorization.

398136040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9953412 (or 9953408 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 398136040 is about 19953.3465864752. The cubic root of 398136040 is about 735.6600361634.

The spelling of 398136040 in words is "three hundred ninety-eight million, one hundred thirty-six thousand, forty".