22277240 has 16 divisors (see below), whose sum is σ = 50123880. Its totient is φ = 8910880.

The previous prime is 22277239. The next prime is 22277243. The reversal of 22277240 is 4277222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22277243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278426 + ... + 278505.

Almost surely, 2^22277240 is an apocalyptic number.

22277240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22277240 is an abundant number, since it is smaller than the sum of its proper divisors (27846640).

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

22277240 is a wasteful number, since it uses less digits than its factorization.

22277240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556942 (or 556938 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 22277240 is about 4719.8771170445. The cubic root of 22277240 is about 281.3760495074.

The spelling of 22277240 in words is "twenty-two million, two hundred seventy-seven thousand, two hundred forty".