23729220 has 48 divisors (see below), whose sum is σ = 73825920. Its totient is φ = 6327648.

The previous prime is 23729177. The next prime is 23729231. The reversal of 23729220 is 2292732.

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 15 ways as a sum of consecutive naturals, for example, 21432 + ... + 22511.

It is an arithmetic number, because the mean of its divisors is an integer number (1538040).

Almost surely, 2^23729220 is an apocalyptic number.

23729220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23729220 is an abundant number, since it is smaller than the sum of its proper divisors (50096700).

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

23729220 is a wasteful number, since it uses less digits than its factorization.

23729220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43961 (or 43953 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 23729220 is about 4871.2647228415. The cubic root of 23729220 is about 287.3609964460.

The spelling of 23729220 in words is "twenty-three million, seven hundred twenty-nine thousand, two hundred twenty".