22771940 has 24 divisors (see below), whose sum is σ = 48935040. Its totient is φ = 8896608.

The previous prime is 22771939. The next prime is 22771979. The reversal of 22771940 is 4917722.

It is a super-2 number, since 2×22771940² = 1037122502727200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22771897 and 22771906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12380 + ... + 14099.

It is an arithmetic number, because the mean of its divisors is an integer number (2038960).

Almost surely, 2^22771940 is an apocalyptic number.

22771940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22771940 is an abundant number, since it is smaller than the sum of its proper divisors (26163100).

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

22771940 is a wasteful number, since it uses less digits than its factorization.

22771940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26531 (or 26529 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 22771940 is about 4771.9953897715. The cubic root of 22771940 is about 283.4436141252.

The spelling of 22771940 in words is "twenty-two million, seven hundred seventy-one thousand, nine hundred forty".