23898420 has 144 divisors (see below), whose sum is σ = 89281920. Its totient is φ = 5038848.

The previous prime is 23898401. The next prime is 23898421. The reversal of 23898420 is 2489832.

It is a super-2 number, since 2×23898420² = 1142268956992800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23898421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15651 + ... + 17109.

Almost surely, 2^23898420 is an apocalyptic number.

23898420 is a gapful number since it is divisible by the number (20) 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 23898420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44640960).

23898420 is an abundant number, since it is smaller than the sum of its proper divisors (65383500).

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

23898420 is a wasteful number, since it uses less digits than its factorization.

23898420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 23898420 is about 4888.6010268788. The cubic root of 23898420 is about 288.0423838085.

The spelling of 23898420 in words is "twenty-three million, eight hundred ninety-eight thousand, four hundred twenty".