22097740 has 24 divisors (see below), whose sum is σ = 53034912. Its totient is φ = 7576320.

The previous prime is 22097737. The next prime is 22097749. The reversal of 22097740 is 4779022.

It is a happy number.

It is a super-2 number, since 2×22097740² = 976620226215200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22097749) 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, 78781 + ... + 79060.

It is an arithmetic number, because the mean of its divisors is an integer number (2209788).

Almost surely, 2^22097740 is an apocalyptic number.

22097740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22097740 is an abundant number, since it is smaller than the sum of its proper divisors (30937172).

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

22097740 is a wasteful number, since it uses less digits than its factorization.

22097740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157857 (or 157855 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 22097740 is about 4700.8233321409. The cubic root of 22097740 is about 280.6182766166.

The spelling of 22097740 in words is "twenty-two million, ninety-seven thousand, seven hundred forty".