23283840 has 128 divisors (see below), whose sum is σ = 75741120. Its totient is φ = 6082560.

The previous prime is 23283803. The next prime is 23283851. The reversal of 23283840 is 4838232.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 23283798 and 23283807.

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, 128550 + ... + 128730.

Almost surely, 2^23283840 is an apocalyptic number.

23283840 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 23283840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37870560).

23283840 is an abundant number, since it is smaller than the sum of its proper divisors (52457280).

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

23283840 is a wasteful number, since it uses less digits than its factorization.

23283840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 23283840 is about 4825.3331491204. Note that the first 3 decimals coincide. The cubic root of 23283840 is about 285.5517780631.

The spelling of 23283840 in words is "twenty-three million, two hundred eighty-three thousand, eight hundred forty".