23261780 has 48 divisors (see below), whose sum is σ = 53415936. Its totient is φ = 8471040.

The previous prime is 23261779. The next prime is 23261813. The reversal of 23261780 is 8716232.

It is a happy number.

It is a super-2 number, since 2×23261780² = 1082220817536800, which contains 22 as substring.

It is a congruent number.

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, 9437 + ... + 11643.

It is an arithmetic number, because the mean of its divisors is an integer number (1112832).

Almost surely, 2^23261780 is an apocalyptic number.

23261780 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 23261780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26707968).

23261780 is an abundant number, since it is smaller than the sum of its proper divisors (30154156).

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

23261780 is a wasteful number, since it uses less digits than its factorization.

23261780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264 (or 2262 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 23261780 is about 4823.0467549050. The cubic root of 23261780 is about 285.4615686781.

The spelling of 23261780 in words is "twenty-three million, two hundred sixty-one thousand, seven hundred eighty".