16225940 has 12 divisors (see below), whose sum is σ = 34074516. Its totient is φ = 6490368.

The previous prime is 16225933. The next prime is 16225961. The reversal of 16225940 is 4952261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5973136 + 10252804 = 2444^2 + 3202^2 .

It is a super-2 number, since 2×16225940² = 526562257767200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405629 + ... + 405668.

It is an arithmetic number, because the mean of its divisors is an integer number (2839543).

Almost surely, 2^16225940 is an apocalyptic number.

16225940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16225940 is an abundant number, since it is smaller than the sum of its proper divisors (17848576).

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

16225940 is a wasteful number, since it uses less digits than its factorization.

16225940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811306 (or 811304 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16225940 is about 4028.1434929754. The cubic root of 16225940 is about 253.1647809245.

The spelling of 16225940 in words is "sixteen million, two hundred twenty-five thousand, nine hundred forty".