22077940 has 24 divisors (see below), whose sum is σ = 46778760. Its totient is φ = 8752128.

The previous prime is 22077931. The next prime is 22077941. The reversal of 22077940 is 4977022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 156816 + 21921124 = 396^2 + 4682^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22077941) 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, 2625 + ... + 7144.

It is an arithmetic number, because the mean of its divisors is an integer number (1949115).

Almost surely, 2^22077940 is an apocalyptic number.

22077940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22077940 is an abundant number, since it is smaller than the sum of its proper divisors (24700820).

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

22077940 is a wasteful number, since it uses less digits than its factorization.

22077940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9891 (or 9889 counting only the distinct ones).

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

The square root of 22077940 is about 4698.7168461187. The cubic root of 22077940 is about 280.5344384473.

The spelling of 22077940 in words is "twenty-two million, seventy-seven thousand, nine hundred forty".