398007511994 has 8 divisors (see below), whose sum is σ = 608275631700. Its totient is φ = 195248968096.

The previous prime is 398007511987. The next prime is 398007512003. The reversal of 398007511994 is 499115700893.

It can be written as a sum of positive squares in 2 ways, for example, as 388207501969 + 9800010025 = 623063^2 + 98995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1877393819 + ... + 1877394030.

Almost surely, 2^398007511994 is an apocalyptic number.

398007511994 is a deficient number, since it is larger than the sum of its proper divisors (210268119706).

398007511994 is a wasteful number, since it uses less digits than its factorization.

398007511994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754787904.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 398007511994 in words is "three hundred ninety-eight billion, seven million, five hundred eleven thousand, nine hundred ninety-four".