23400522 has 64 divisors (see below), whose sum is σ = 55157760. Its totient is φ = 7338672.

The previous prime is 23400493. The next prime is 23400523. The reversal of 23400522 is 22500432.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23400495 and 23400504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23400523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102973 + ... + 103199.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^23400522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23400522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27578880).

23400522 is an abundant number, since it is smaller than the sum of its proper divisors (31757238).

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

23400522 is a wasteful number, since it uses less digits than its factorization.

23400522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 23400522 is about 4837.4086037878. The cubic root of 23400522 is about 286.0279774414.

Adding to 23400522 its reverse (22500432), we get a palindrome (45900954).

The spelling of 23400522 in words is "twenty-three million, four hundred thousand, five hundred twenty-two".