16220040 has 64 divisors (see below), whose sum is σ = 51528960. Its totient is φ = 4070400.

The previous prime is 16219981. The next prime is 16220069. The reversal of 16220040 is 4002261.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1936 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (805140).

Almost surely, 2^16220040 is an apocalyptic number.

16220040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16220040 is an abundant number, since it is smaller than the sum of its proper divisors (35308920).

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

16220040 is a wasteful number, since it uses less digits than its factorization.

16220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7982 (or 7978 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 16220040 is about 4027.4110790929. The cubic root of 16220040 is about 253.1340923422.

It can be divided in two parts, 162 and 20040, that added together give a palindrome (20202).

The spelling of 16220040 in words is "sixteen million, two hundred twenty thousand, forty".