23359440 has 80 divisors (see below), whose sum is σ = 77995008. Its totient is φ = 5749248.

The previous prime is 23359439. The next prime is 23359447. The reversal of 23359440 is 4495332.

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

It is a super-2 number, since 2×23359440² = 1091326874227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23359398 and 23359407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23359447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624 + ... + 6863.

Almost surely, 2^23359440 is an apocalyptic number.

23359440 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 23359440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38997504).

23359440 is an abundant number, since it is smaller than the sum of its proper divisors (54635568).

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

23359440 is a wasteful number, since it uses less digits than its factorization.

23359440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7516 (or 7510 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 23359440 is about 4833.1604566784. The cubic root of 23359440 is about 285.8604956427.

The spelling of 23359440 in words is "twenty-three million, three hundred fifty-nine thousand, four hundred forty".