22751280 has 100 divisors (see below), whose sum is σ = 79041072. Its totient is φ = 6065280.

The previous prime is 22751251. The next prime is 22751291. The reversal of 22751280 is 8215722.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4725 + ... + 8235.

Almost surely, 2^22751280 is an apocalyptic number.

22751280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22751280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39520536).

22751280 is an abundant number, since it is smaller than the sum of its proper divisors (56289792).

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

22751280 is a wasteful number, since it uses less digits than its factorization.

22751280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22751280 is about 4769.8301856565. The cubic root of 22751280 is about 283.3578694630.

The spelling of 22751280 in words is "twenty-two million, seven hundred fifty-one thousand, two hundred eighty".