16864290 has 48 divisors (see below), whose sum is σ = 45759168. Its totient is φ = 4301088.

The previous prime is 16864277. The next prime is 16864291. The reversal of 16864290 is 9246861.

Added to its reverse (9246861) it gives a triangular number (26111151 = T₇₂₂₆).

16864290 is a `hidden beast` number, since 1 + 6 + 8 + 642 + 9 + 0 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16864291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2004 + ... + 6143.

It is an arithmetic number, because the mean of its divisors is an integer number (953316).

Almost surely, 2^16864290 is an apocalyptic number.

16864290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16864290 is an abundant number, since it is smaller than the sum of its proper divisors (28894878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16864290 is a wasteful number, since it uses less digits than its factorization.

16864290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8183 (or 8180 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 16864290 is about 4106.6153947016. The cubic root of 16864290 is about 256.4421172811.

Adding to 16864290 its reverse (9246861), we get a triangular number (26111151 = T₇₂₂₆).

The spelling of 16864290 in words is "sixteen million, eight hundred sixty-four thousand, two hundred ninety".