23161380 has 96 divisors (see below), whose sum is σ = 74511360. Its totient is φ = 5316480.

The previous prime is 23161379. The next prime is 23161381. The reversal of 23161380 is 8316132.

It is an interprime number because it is at equal distance from previous prime (23161379) and next prime (23161381).

It is a self number, because there is not a number n which added to its sum of digits gives 23161380.

It is not an unprimeable number, because it can be changed into a prime (23161381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11617 + ... + 13463.

It is an arithmetic number, because the mean of its divisors is an integer number (776160).

Almost surely, 2^23161380 is an apocalyptic number.

23161380 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 23161380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37255680).

23161380 is an abundant number, since it is smaller than the sum of its proper divisors (51349980).

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

23161380 is a wasteful number, since it uses less digits than its factorization.

23161380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 23161380 is about 4812.6271411777. The cubic root of 23161380 is about 285.0502835254.

The spelling of 23161380 in words is "twenty-three million, one hundred sixty-one thousand, three hundred eighty".