1980840954 has 64 divisors (see below), whose sum is σ = 4188159360. Its totient is φ = 623738880.

The previous prime is 1980840931. The next prime is 1980840989. The reversal of 1980840954 is 4590480891.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2575482 + ... + 2576250.

It is an arithmetic number, because the mean of its divisors is an integer number (65439990).

Almost surely, 2^1980840954 is an apocalyptic number.

1980840954 is an abundant number, since it is smaller than the sum of its proper divisors (2207318406).

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

1980840954 is a wasteful number, since it uses less digits than its factorization.

1980840954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 1980840954 is about 44506.6394372795. The cubic root of 1980840954 is about 1255.8849869160.

The spelling of 1980840954 in words is "one billion, nine hundred eighty million, eight hundred forty thousand, nine hundred fifty-four".