22787072 has 132 divisors (see below), whose sum is σ = 60329184. Its totient is φ = 8355840.

The previous prime is 22787071. The next prime is 22787081. The reversal of 22787072 is 27078722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22787071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1340408 + ... + 1340424.

Almost surely, 2^22787072 is an apocalyptic number.

22787072 is a gapful number since it is divisible by the number (22) 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 22787072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30164592).

22787072 is an abundant number, since it is smaller than the sum of its proper divisors (37542112).

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

22787072 is a wasteful number, since it uses less digits than its factorization.

22787072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 22787072 is about 4773.5806267413. The cubic root of 22787072 is about 283.5063831747.

The spelling of 22787072 in words is "twenty-two million, seven hundred eighty-seven thousand, seventy-two".