16878490 has 8 divisors (see below), whose sum is σ = 30381300. Its totient is φ = 6751392.

The previous prime is 16878473. The next prime is 16878497. The reversal of 16878490 is 9487861.

It can be written as a sum of positive squares in 2 ways, for example, as 16008001 + 870489 = 4001^2 + 933^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16878497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843915 + ... + 843934.

Almost surely, 2^16878490 is an apocalyptic number.

16878490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16878490 is a deficient number, since it is larger than the sum of its proper divisors (13502810).

16878490 is a wasteful number, since it uses less digits than its factorization.

16878490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687856.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 16878490 is about 4108.3439486002. The cubic root of 16878490 is about 256.5140732006.

The spelling of 16878490 in words is "sixteen million, eight hundred seventy-eight thousand, four hundred ninety".