16783980 has 48 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 4458688.

The previous prime is 16783979. The next prime is 16783993. The reversal of 16783980 is 8938761.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27721 + ... + 28319.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^16783980 is an apocalyptic number.

16783980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16783980 is an abundant number, since it is smaller than the sum of its proper divisors (30390420).

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

16783980 is a wasteful number, since it uses less digits than its factorization.

16783980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 16783980 is about 4096.8256003887. The cubic root of 16783980 is about 256.0343988607.

The spelling of 16783980 in words is "sixteen million, seven hundred eighty-three thousand, nine hundred eighty".