16939478 has 16 divisors (see below), whose sum is σ = 26205984. Its totient is φ = 8207040.

The previous prime is 16939457. The next prime is 16939487. The reversal of 16939478 is 87493961.

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, 13076 + ... + 14312.

It is an arithmetic number, because the mean of its divisors is an integer number (1637874).

Almost surely, 2^16939478 is an apocalyptic number.

16939478 is a deficient number, since it is larger than the sum of its proper divisors (9266506).

16939478 is a wasteful number, since it uses less digits than its factorization.

16939478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447.

The product of its digits is 326592, while the sum is 47.

The square root of 16939478 is about 4115.7597111590. The cubic root of 16939478 is about 256.8226607430.

The spelling of 16939478 in words is "sixteen million, nine hundred thirty-nine thousand, four hundred seventy-eight".