23420730 has 64 divisors (see below), whose sum is σ = 62674560. Its totient is φ = 5566464.

The previous prime is 23420729. The next prime is 23420737. The reversal of 23420730 is 3702432.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23420697 and 23420706.

It is not an unprimeable number, because it can be changed into a prime (23420737) 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, 8482 + ... + 10898.

It is an arithmetic number, because the mean of its divisors is an integer number (979290).

Almost surely, 2^23420730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23420730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31337280).

23420730 is an abundant number, since it is smaller than the sum of its proper divisors (39253830).

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

23420730 is a wasteful number, since it uses less digits than its factorization.

23420730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463.

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 23420730 is about 4839.4968746761. The cubic root of 23420730 is about 286.1102888579.

The spelling of 23420730 in words is "twenty-three million, four hundred twenty thousand, seven hundred thirty".