398909890142 has 4 divisors (see below), whose sum is σ = 598364835216. Its totient is φ = 199454945070.

The previous prime is 398909890121. The next prime is 398909890157. The reversal of 398909890142 is 241098909893.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99727472534 + ... + 99727472537.

It is an arithmetic number, because the mean of its divisors is an integer number (149591208804).

Almost surely, 2^398909890142 is an apocalyptic number.

398909890142 is a deficient number, since it is larger than the sum of its proper divisors (199454945074).

398909890142 is a wasteful number, since it uses less digits than its factorization.

398909890142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199454945073.

The product of its (nonzero) digits is 10077696, while the sum is 62.

The spelling of 398909890142 in words is "three hundred ninety-eight billion, nine hundred nine million, eight hundred ninety thousand, one hundred forty-two".