23447900 has 144 divisors (see below), whose sum is σ = 64162560. Its totient is φ = 7257600.

The previous prime is 23447891. The next prime is 23447903. The reversal of 23447900 is 974432.

23447900 = 238² + 239² + ... + 437².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23447903) 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 47 ways as a sum of consecutive naturals, for example, 545279 + ... + 545321.

Almost surely, 2^23447900 is an apocalyptic number.

23447900 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 23447900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32081280).

23447900 is an abundant number, since it is smaller than the sum of its proper divisors (40714660).

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

23447900 is a wasteful number, since it uses less digits than its factorization.

23447900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 23447900 is about 4842.3031710127. The cubic root of 23447900 is about 286.2208833678.

The spelling of 23447900 in words is "twenty-three million, four hundred forty-seven thousand, nine hundred".