16575640 has 64 divisors (see below), whose sum is σ = 39916800. Its totient is φ = 6179712.

The previous prime is 16575623. The next prime is 16575677. The reversal of 16575640 is 4657561.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16575596 and 16575605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39351 + ... + 39769.

It is an arithmetic number, because the mean of its divisors is an integer number (623700).

Almost surely, 2^16575640 is an apocalyptic number.

16575640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16575640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19958400).

16575640 is an abundant number, since it is smaller than the sum of its proper divisors (23341160).

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

16575640 is a wasteful number, since it uses less digits than its factorization.

16575640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 16575640 is about 4071.3191965259. The cubic root of 16575640 is about 254.9705976608.

The spelling of 16575640 in words is "sixteen million, five hundred seventy-five thousand, six hundred forty".