23283640 has 32 divisors (see below), whose sum is σ = 53610480. Its totient is φ = 9096192.

The previous prime is 23283593. The next prime is 23283643. The reversal of 23283640 is 4638232.

It is a junction number, because it is equal to n+sod(n) for n = 23283599 and 23283608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23283643) 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 7 ways as a sum of consecutive naturals, for example, 5049 + ... + 8488.

Almost surely, 2^23283640 is an apocalyptic number.

23283640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23283640 is an abundant number, since it is smaller than the sum of its proper divisors (30326840).

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

23283640 is a wasteful number, since it uses less digits than its factorization.

23283640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13591 (or 13587 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 23283640 is about 4825.3124251182. The cubic root of 23283640 is about 285.5509604643.

The spelling of 23283640 in words is "twenty-three million, two hundred eighty-three thousand, six hundred forty".