16938140 has 24 divisors (see below), whose sum is σ = 35940912. Its totient is φ = 6704640.

The previous prime is 16938127. The next prime is 16938157. The reversal of 16938140 is 4183961.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16938097 and 16938106.

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, 2426 + ... + 6305.

It is an arithmetic number, because the mean of its divisors is an integer number (1497538).

Almost surely, 2^16938140 is an apocalyptic number.

16938140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16938140 is an abundant number, since it is smaller than the sum of its proper divisors (19002772).

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

16938140 is a wasteful number, since it uses less digits than its factorization.

16938140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8837 (or 8835 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 16938140 is about 4115.5971620167. The cubic root of 16938140 is about 256.8158986737.

The spelling of 16938140 in words is "sixteen million, nine hundred thirty-eight thousand, one hundred forty".