16912890 has 24 divisors (see below), whose sum is σ = 43973748. Its totient is φ = 4510080.

The previous prime is 16912853. The next prime is 16912919. The reversal of 16912890 is 9821961.

It can be written as a sum of positive squares in 2 ways, for example, as 15752961 + 1159929 = 3969^2 + 1077^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93871 + ... + 94050.

Almost surely, 2^16912890 is an apocalyptic number.

16912890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16912890 is an abundant number, since it is smaller than the sum of its proper divisors (27060858).

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

16912890 is a wasteful number, since it uses less digits than its factorization.

16912890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187934 (or 187931 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 16912890 is about 4112.5284193547. The cubic root of 16912890 is about 256.6882217987.

The spelling of 16912890 in words is "sixteen million, nine hundred twelve thousand, eight hundred ninety".