398933139502 has 4 divisors (see below), whose sum is σ = 598399709256. Its totient is φ = 199466569750.

The previous prime is 398933139469. The next prime is 398933139509. The reversal of 398933139502 is 205931339893.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398933139509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99733284874 + ... + 99733284877.

It is an arithmetic number, because the mean of its divisors is an integer number (149599927314).

Almost surely, 2^398933139502 is an apocalyptic number.

398933139502 is a deficient number, since it is larger than the sum of its proper divisors (199466569754).

398933139502 is a wasteful number, since it uses less digits than its factorization.

398933139502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199466569753.

The product of its (nonzero) digits is 4723920, while the sum is 55.

The spelling of 398933139502 in words is "three hundred ninety-eight billion, nine hundred thirty-three million, one hundred thirty-nine thousand, five hundred two".