16906404 has 12 divisors (see below), whose sum is σ = 39448304. Its totient is φ = 5635464.

The previous prime is 16906369. The next prime is 16906411. The reversal of 16906404 is 40460961.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×16906404² = 571652992422432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704422 + ... + 704445.

Almost surely, 2^16906404 is an apocalyptic number.

It is an amenable number.

16906404 is an abundant number, since it is smaller than the sum of its proper divisors (22541900).

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

16906404 is a wasteful number, since it uses less digits than its factorization.

16906404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408874 (or 1408872 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 16906404 is about 4111.7397777583. The cubic root of 16906404 is about 256.6554047644.

The spelling of 16906404 in words is "sixteen million, nine hundred six thousand, four hundred four".