16139810 has 8 divisors (see below), whose sum is σ = 29051676. Its totient is φ = 6455920.

The previous prime is 16139803. The next prime is 16139821. The reversal of 16139810 is 1893161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15578809 + 561001 = 3947^2 + 749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×16139810² = 520986933672200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806981 + ... + 807000.

Almost surely, 2^16139810 is an apocalyptic number.

16139810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16139810 is a deficient number, since it is larger than the sum of its proper divisors (12911866).

16139810 is a wasteful number, since it uses less digits than its factorization.

16139810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613988.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 16139810 is about 4017.4382384798. The cubic root of 16139810 is about 252.7160390039.

The spelling of 16139810 in words is "sixteen million, one hundred thirty-nine thousand, eight hundred ten".