1983890690 has 16 divisors (see below), whose sum is σ = 3572382528. Its totient is φ = 793249776.

The previous prime is 1983890687. The next prime is 1983890693. The reversal of 1983890690 is 960983891.

It is an interprime number because it is at equal distance from previous prime (1983890687) and next prime (1983890693).

It is a super-2 number, since 2×1983890690² = 7871644539737352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1983890693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10142 + ... + 63801.

It is an arithmetic number, because the mean of its divisors is an integer number (223273908).

Almost surely, 2^1983890690 is an apocalyptic number.

1983890690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1983890690 is a deficient number, since it is larger than the sum of its proper divisors (1588491838).

1983890690 is a wasteful number, since it uses less digits than its factorization.

1983890690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76633.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 1983890690 is about 44540.8878447657. The cubic root of 1983890690 is about 1256.5291836296.

The spelling of 1983890690 in words is "one billion, nine hundred eighty-three million, eight hundred ninety thousand, six hundred ninety".