1989793842 has 16 divisors (see below), whose sum is σ = 3980714112. Its totient is φ = 663076880.

The previous prime is 1989793823. The next prime is 1989793873. The reversal of 1989793842 is 2483979891.

It is a super-2 number, since 2×1989793842² = 7918559067322241928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23034 + ... + 67157.

It is an arithmetic number, because the mean of its divisors is an integer number (248794632).

Almost surely, 2^1989793842 is an apocalyptic number.

1989793842 is an abundant number, since it is smaller than the sum of its proper divisors (1990920270).

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

1989793842 is a wasteful number, since it uses less digits than its factorization.

1989793842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93873.

The product of its digits is 7838208, while the sum is 60.

The square root of 1989793842 is about 44607.1052860416. The cubic root of 1989793842 is about 1257.7742350707.

The spelling of 1989793842 in words is "one billion, nine hundred eighty-nine million, seven hundred ninety-three thousand, eight hundred forty-two".