16400560 has 40 divisors (see below), whose sum is σ = 41600016. Its totient is φ = 5963520.

The previous prime is 16400539. The next prime is 16400567. The reversal of 16400560 is 6500461.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (16400567) 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, 8439 + ... + 10198.

Almost surely, 2^16400560 is an apocalyptic number.

16400560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16400560 is an abundant number, since it is smaller than the sum of its proper divisors (25199456).

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

16400560 is a wasteful number, since it uses less digits than its factorization.

16400560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18661 (or 18655 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 16400560 is about 4049.7604867449. The cubic root of 16400560 is about 254.0697103390.

Subtracting from 16400560 its reverse (6500461), we obtain a palindrome (9900099).

The spelling of 16400560 in words is "sixteen million, four hundred thousand, five hundred sixty".