398587807956 has 48 divisors (see below), whose sum is σ = 1003315686464. Its totient is φ = 122429822976.

The previous prime is 398587807921. The next prime is 398587807957. The reversal of 398587807956 is 659708785893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398587807957) 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, 2124070 + ... + 2304093.

Almost surely, 2^398587807956 is an apocalyptic number.

It is an amenable number.

398587807956 is an abundant number, since it is smaller than the sum of its proper divisors (604727878508).

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

398587807956 is a wasteful number, since it uses less digits than its factorization.

398587807956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428760 (or 4428758 counting only the distinct ones).

The product of its (nonzero) digits is 914457600, while the sum is 75.

The spelling of 398587807956 in words is "three hundred ninety-eight billion, five hundred eighty-seven million, eight hundred seven thousand, nine hundred fifty-six".