1998939502 has 32 divisors (see below), whose sum is σ = 3514230720. Its totient is φ = 834865920.

The previous prime is 1998939473. The next prime is 1998939511. The reversal of 1998939502 is 2059398991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819028 + ... + 821464.

It is an arithmetic number, because the mean of its divisors is an integer number (109819710).

Almost surely, 2^1998939502 is an apocalyptic number.

1998939502 is a deficient number, since it is larger than the sum of its proper divisors (1515291218).

1998939502 is a wasteful number, since it uses less digits than its factorization.

1998939502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3916.

The product of its (nonzero) digits is 1574640, while the sum is 55.

The square root of 1998939502 is about 44709.5012497344. The cubic root of 1998939502 is about 1259.6983198972.

The spelling of 1998939502 in words is "one billion, nine hundred ninety-eight million, nine hundred thirty-nine thousand, five hundred two".