16290681 has 8 divisors (see below), whose sum is σ = 23695584. Its totient is φ = 9873120.

The previous prime is 16290613. The next prime is 16290691. The reversal of 16290681 is 18609261.

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

It is not a de Polignac number, because 16290681 - 2⁷ = 16290553 is a prime.

It is a super-2 number, since 2×16290681² = 530772574887522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 493657 = 16290681 / (1 + 6 + 2 + 9 + 0 + 6 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (16290691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246796 + ... + 246861.

It is an arithmetic number, because the mean of its divisors is an integer number (2961948).

Almost surely, 2^16290681 is an apocalyptic number.

16290681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16290681 is a deficient number, since it is larger than the sum of its proper divisors (7404903).

16290681 is a wasteful number, since it uses less digits than its factorization.

16290681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493671.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 16290681 is about 4036.1715771260. The cubic root of 16290681 is about 253.5010406533.

The spelling of 16290681 in words is "sixteen million, two hundred ninety thousand, six hundred eighty-one".