16407890 has 16 divisors (see below), whose sum is σ = 31271832. Its totient is φ = 6177024.

The previous prime is 16407869. The next prime is 16407929. The reversal of 16407890 is 9870461.

It can be written as a sum of positive squares in 4 ways, for example, as 14984641 + 1423249 = 3871^2 + 1193^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16407890.

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, 48089 + ... + 48428.

Almost surely, 2^16407890 is an apocalyptic number.

16407890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16407890 is a deficient number, since it is larger than the sum of its proper divisors (14863942).

16407890 is a wasteful number, since it uses less digits than its factorization.

16407890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96541.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 16407890 is about 4050.6653774411. The cubic root of 16407890 is about 254.1075556646.

The spelling of 16407890 in words is "sixteen million, four hundred seven thousand, eight hundred ninety".