16507490 has 16 divisors (see below), whose sum is σ = 30121848. Its totient is φ = 6512256.

The previous prime is 16507489. The next prime is 16507507. The reversal of 16507490 is 9470561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13227769 + 3279721 = 3637^2 + 1811^2 .

It is a super-2 number, since 2×16507490² = 544994452200200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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, 10577 + ... + 12036.

Almost surely, 2^16507490 is an apocalyptic number.

16507490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16507490 is a deficient number, since it is larger than the sum of its proper divisors (13614358).

16507490 is a wasteful number, since it uses less digits than its factorization.

16507490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22693.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 16507490 is about 4062.9410529812. The cubic root of 16507490 is about 254.6206842807.

The spelling of 16507490 in words is "sixteen million, five hundred seven thousand, four hundred ninety".