16498978 has 4 divisors (see below), whose sum is σ = 24748470. Its totient is φ = 8249488.

The previous prime is 16498969. The next prime is 16498997. The reversal of 16498978 is 87989461.

It is a happy number.

16498978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13786369 + 2712609 = 3713^2 + 1647^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4124743 + ... + 4124746.

Almost surely, 2^16498978 is an apocalyptic number.

16498978 is a deficient number, since it is larger than the sum of its proper divisors (8249492).

16498978 is an equidigital number, since it uses as much as digits as its factorization.

16498978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8249491.

The product of its digits is 870912, while the sum is 52.

The square root of 16498978 is about 4061.8934008662. The cubic root of 16498978 is about 254.5769121527.

The spelling of 16498978 in words is "sixteen million, four hundred ninety-eight thousand, nine hundred seventy-eight".