398706136 has 8 divisors (see below), whose sum is σ = 747574020. Its totient is φ = 199353064.

The previous prime is 398706131. The next prime is 398706137. The reversal of 398706136 is 631607893.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 398706092 and 398706101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398706131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24919126 + ... + 24919141.

Almost surely, 2^398706136 is an apocalyptic number.

It is an amenable number.

398706136 is a deficient number, since it is larger than the sum of its proper divisors (348867884).

398706136 is a wasteful number, since it uses less digits than its factorization.

398706136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49838273 (or 49838269 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 398706136 is about 19967.6272000456. The cubic root of 398706136 is about 736.0110023166.

The spelling of 398706136 in words is "three hundred ninety-eight million, seven hundred six thousand, one hundred thirty-six".