16122640 has 40 divisors (see below), whose sum is σ = 39461760. Its totient is φ = 6109056.

The previous prime is 16122629. The next prime is 16122649. The reversal of 16122640 is 4622161.

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

It is not an unprimeable number, because it can be changed into a prime (16122649) 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, 3784 + ... + 6823.

It is an arithmetic number, because the mean of its divisors is an integer number (986544).

Almost surely, 2^16122640 is an apocalyptic number.

16122640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16122640 is an abundant number, since it is smaller than the sum of its proper divisors (23339120).

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

16122640 is a wasteful number, since it uses less digits than its factorization.

16122640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10639 (or 10633 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16122640 is about 4015.3007359350. The cubic root of 16122640 is about 252.6263916454.

It can be divided in two parts, 161 and 22640, that added together give a square (22801 = 151²).

The spelling of 16122640 in words is "sixteen million, one hundred twenty-two thousand, six hundred forty".