16538290 has 16 divisors (see below), whose sum is σ = 30274560. Its totient is φ = 6502960.

The previous prime is 16538287. The next prime is 16538299. The reversal of 16538290 is 9283561.

It is a super-2 number, since 2×16538290² = 547030072248200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16538299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13426 + ... + 14605.

It is an arithmetic number, because the mean of its divisors is an integer number (1892160).

Almost surely, 2^16538290 is an apocalyptic number.

16538290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16538290 is a deficient number, since it is larger than the sum of its proper divisors (13736270).

16538290 is a wasteful number, since it uses less digits than its factorization.

16538290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28097.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 16538290 is about 4066.7296443211. The cubic root of 16538290 is about 254.7789446558.

The spelling of 16538290 in words is "sixteen million, five hundred thirty-eight thousand, two hundred ninety".