22729780 has 24 divisors (see below), whose sum is σ = 47980800. Its totient is φ = 9044640.

The previous prime is 22729769. The next prime is 22729781. The reversal of 22729780 is 8792722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22729781) 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, 1125 + ... + 6835.

It is an arithmetic number, because the mean of its divisors is an integer number (1999200).

Almost surely, 2^22729780 is an apocalyptic number.

22729780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22729780 is an abundant number, since it is smaller than the sum of its proper divisors (25251020).

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

22729780 is a wasteful number, since it uses less digits than its factorization.

22729780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919 (or 5917 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 22729780 is about 4767.5759039579. The cubic root of 22729780 is about 283.2685834353.

The spelling of 22729780 in words is "twenty-two million, seven hundred twenty-nine thousand, seven hundred eighty".