22129756 has 48 divisors (see below), whose sum is σ = 45077760. Its totient is φ = 9400320.

The previous prime is 22129739. The next prime is 22129759. The reversal of 22129756 is 65792122.

It is a super-2 number, since 2×22129756² = 979452201239072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22129759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85980 + ... + 86236.

It is an arithmetic number, because the mean of its divisors is an integer number (939120).

Almost surely, 2^22129756 is an apocalyptic number.

It is an amenable number.

22129756 is an abundant number, since it is smaller than the sum of its proper divisors (22948004).

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

22129756 is a wasteful number, since it uses less digits than its factorization.

22129756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 22129756 is about 4704.2274604870. The cubic root of 22129756 is about 280.7537345009.

The spelling of 22129756 in words is "twenty-two million, one hundred twenty-nine thousand, seven hundred fifty-six".