1980435408 has 40 divisors (see below), whose sum is σ = 5847000768. Its totient is φ = 565838592.

The previous prime is 1980435377. The next prime is 1980435427. The reversal of 1980435408 is 8045340891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1980435408.

It is a congruent number.

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, 2946741 + ... + 2947412.

Almost surely, 2^1980435408 is an apocalyptic number.

It is an amenable number.

1980435408 is an abundant number, since it is smaller than the sum of its proper divisors (3866565360).

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

1980435408 is a wasteful number, since it uses less digits than its factorization.

1980435408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894171 (or 5894165 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1980435408 is about 44502.0831871947. The cubic root of 1980435408 is about 1255.7992735065.

The spelling of 1980435408 in words is "one billion, nine hundred eighty million, four hundred thirty-five thousand, four hundred eight".