16451790 has 16 divisors (see below), whose sum is σ = 39484368. Its totient is φ = 4387136.

The previous prime is 16451723. The next prime is 16451797. The reversal of 16451790 is 9715461.

It is a super-2 number, since 2×16451790² = 541322788408200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16451797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274167 + ... + 274226.

It is an arithmetic number, because the mean of its divisors is an integer number (2467773).

Almost surely, 2^16451790 is an apocalyptic number.

16451790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16451790 is an abundant number, since it is smaller than the sum of its proper divisors (23032578).

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

16451790 is a wasteful number, since it uses less digits than its factorization.

16451790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548403.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 16451790 is about 4056.0806205005. The cubic root of 16451790 is about 254.3339790014. Note that the first 3 decimals are identical.

The spelling of 16451790 in words is "sixteen million, four hundred fifty-one thousand, seven hundred ninety".