23801220 has 36 divisors (see below), whose sum is σ = 72197580. Its totient is φ = 6346944.

The previous prime is 23801213. The next prime is 23801227. The reversal of 23801220 is 2210832.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23801213) and next prime (23801227).

It can be written as a sum of positive squares in 2 ways, for example, as 6110784 + 17690436 = 2472^2 + 4206^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23801193 and 23801202.

It is not an unprimeable number, because it can be changed into a prime (23801227) 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, 65935 + ... + 66294.

Almost surely, 2^23801220 is an apocalyptic number.

23801220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23801220 is an abundant number, since it is smaller than the sum of its proper divisors (48396360).

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

23801220 is a wasteful number, since it uses less digits than its factorization.

23801220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132244 (or 132239 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 23801220 is about 4878.6494032673. The cubic root of 23801220 is about 287.6513431277.

It can be divided in two parts, 2380 and 1220, that added together give a square (3600 = 60²).

The spelling of 23801220 in words is "twenty-three million, eight hundred one thousand, two hundred twenty".