23097840 has 80 divisors (see below), whose sum is σ = 72176928. Its totient is φ = 6110208.

The previous prime is 23097839. The next prime is 23097869. The reversal of 23097840 is 4879032.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37374 + ... + 37986.

Almost surely, 2^23097840 is an apocalyptic number.

23097840 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 23097840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36088464).

23097840 is an abundant number, since it is smaller than the sum of its proper divisors (49079088).

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

23097840 is a wasteful number, since it uses less digits than its factorization.

23097840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 23097840 is about 4806.0212234238. The cubic root of 23097840 is about 284.7893796275.

The spelling of 23097840 in words is "twenty-three million, ninety-seven thousand, eight hundred forty".