23647428 has 72 divisors (see below), whose sum is σ = 69031872. Its totient is φ = 6685632.

The previous prime is 23647423. The next prime is 23647453. The reversal of 23647428 is 82474632.

23647428 is a `hidden beast` number, since 2 + 3 + 647 + 4 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23647392 and 23647401.

It is not an unprimeable number, because it can be changed into a prime (23647423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26526 + ... + 27402.

It is an arithmetic number, because the mean of its divisors is an integer number (958776).

Almost surely, 2^23647428 is an apocalyptic number.

23647428 is a gapful number since it is divisible by the number (28) 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 23647428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34515936).

23647428 is an abundant number, since it is smaller than the sum of its proper divisors (45384444).

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

23647428 is a wasteful number, since it uses less digits than its factorization.

23647428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 996 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 23647428 is about 4862.8621201922. The cubic root of 23647428 is about 287.0304491645.

The spelling of 23647428 in words is "twenty-three million, six hundred forty-seven thousand, four hundred twenty-eight".