23597820 has 72 divisors (see below), whose sum is σ = 73906560. Its totient is φ = 6088320.

The previous prime is 23597809. The next prime is 23597831. The reversal of 23597820 is 2879532.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23597809) and next prime (23597831).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3466 + ... + 7694.

It is an arithmetic number, because the mean of its divisors is an integer number (1026480).

Almost surely, 2^23597820 is an apocalyptic number.

23597820 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 23597820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36953280).

23597820 is an abundant number, since it is smaller than the sum of its proper divisors (50308740).

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

23597820 is a wasteful number, since it uses less digits than its factorization.

23597820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275 (or 4270 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 23597820 is about 4857.7587424655. The cubic root of 23597820 is about 286.8295961008.

The spelling of 23597820 in words is "twenty-three million, five hundred ninety-seven thousand, eight hundred twenty".