23691492 has 72 divisors (see below), whose sum is σ = 67616640. Its totient is φ = 6928320.

The previous prime is 23691491. The next prime is 23691529. The reversal of 23691492 is 29419632.

It is a super-2 number, since 2×23691492² = 1122573586372128, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (23691491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10453 + ... + 12515.

It is an arithmetic number, because the mean of its divisors is an integer number (939120).

Almost surely, 2^23691492 is an apocalyptic number.

23691492 is a gapful number since it is divisible by the number (22) 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 23691492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33808320).

23691492 is an abundant number, since it is smaller than the sum of its proper divisors (43925148).

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

23691492 is a wasteful number, since it uses less digits than its factorization.

23691492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113 (or 2108 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 23691492 is about 4867.3906767384. The cubic root of 23691492 is about 287.2086202258.

The spelling of 23691492 in words is "twenty-three million, six hundred ninety-one thousand, four hundred ninety-two".