16404465 has 48 divisors (see below), whose sum is σ = 33324480. Its totient is φ = 6814080.

The previous prime is 16404461. The next prime is 16404503. The reversal of 16404465 is 56440461.

It is not a de Polignac number, because 16404465 - 2² = 16404461 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16404461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7071 + ... + 9099.

It is an arithmetic number, because the mean of its divisors is an integer number (694260).

Almost surely, 2^16404465 is an apocalyptic number.

16404465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16404465 is an abundant number, since it is smaller than the sum of its proper divisors (16920015).

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

16404465 is a wasteful number, since it uses less digits than its factorization.

16404465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062 (or 2055 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 16404465 is about 4050.2425853275. The cubic root of 16404465 is about 254.0898735425.

It can be divided in two parts, 1640 and 4465, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 16404465 in words is "sixteen million, four hundred four thousand, four hundred sixty-five".