1998922542 has 32 divisors (see below), whose sum is σ = 4076599200. Its totient is φ = 653253120.

The previous prime is 1998922529. The next prime is 1998922547. The reversal of 1998922542 is 2452298991.

1998922542 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998922547) 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, 105834 + ... + 123282.

It is an arithmetic number, because the mean of its divisors is an integer number (127393725).

Almost surely, 2^1998922542 is an apocalyptic number.

1998922542 is an abundant number, since it is smaller than the sum of its proper divisors (2077676658).

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

1998922542 is a wasteful number, since it uses less digits than its factorization.

1998922542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17828.

The product of its digits is 933120, while the sum is 51.

The square root of 1998922542 is about 44709.3115804750. The cubic root of 1998922542 is about 1259.6947572508.

The spelling of 1998922542 in words is "one billion, nine hundred ninety-eight million, nine hundred twenty-two thousand, five hundred forty-two".