16978142 has 16 divisors (see below), whose sum is σ = 26417664. Its totient is φ = 8175000.

The previous prime is 16978123. The next prime is 16978147. The reversal of 16978142 is 24187961.

It is a junction number, because it is equal to n+sod(n) for n = 16978096 and 16978105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16978147) 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, 15017 + ... + 16107.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^16978142 is an apocalyptic number.

16978142 is a deficient number, since it is larger than the sum of its proper divisors (9439522).

16978142 is a wasteful number, since it uses less digits than its factorization.

16978142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375.

The product of its digits is 24192, while the sum is 38.

The square root of 16978142 is about 4120.4541011884. The cubic root of 16978142 is about 257.0179096968.

The spelling of 16978142 in words is "sixteen million, nine hundred seventy-eight thousand, one hundred forty-two".