16870538 has 4 divisors (see below), whose sum is σ = 25305810. Its totient is φ = 8435268.

The previous prime is 16870517. The next prime is 16870543. The reversal of 16870538 is 83507861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14845609 + 2024929 = 3853^2 + 1423^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4217633 + ... + 4217636.

Almost surely, 2^16870538 is an apocalyptic number.

16870538 is a deficient number, since it is larger than the sum of its proper divisors (8435272).

16870538 is an equidigital number, since it uses as much as digits as its factorization.

16870538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8435271.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 16870538 is about 4107.3760480385. The cubic root of 16870538 is about 256.4737828600.

The spelling of 16870538 in words is "sixteen million, eight hundred seventy thousand, five hundred thirty-eight".