22429720 has 32 divisors (see below), whose sum is σ = 50602320. Its totient is φ = 8947840.

The previous prime is 22429717. The next prime is 22429723. The reversal of 22429720 is 2792422.

It is an interprime number because it is at equal distance from previous prime (22429717) and next prime (22429723).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22429723) 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, 26910 + ... + 27730.

Almost surely, 2^22429720 is an apocalyptic number.

22429720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22429720 is an abundant number, since it is smaller than the sum of its proper divisors (28172600).

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

22429720 is a wasteful number, since it uses less digits than its factorization.

22429720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1511 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 22429720 is about 4736.0025337831. The cubic root of 22429720 is about 282.0165642568.

The spelling of 22429720 in words is "twenty-two million, four hundred twenty-nine thousand, seven hundred twenty".