23651040 has 96 divisors (see below), whose sum is σ = 85155840. Its totient is φ = 5405184.

The previous prime is 23651021. The next prime is 23651057. The reversal of 23651040 is 4015632.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 23650998 and 23651016.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 160 + ... + 6879.

It is an arithmetic number, because the mean of its divisors is an integer number (887040).

Almost surely, 2^23651040 is an apocalyptic number.

23651040 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 23651040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42577920).

23651040 is an abundant number, since it is smaller than the sum of its proper divisors (61504800).

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

23651040 is a wasteful number, since it uses less digits than its factorization.

23651040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7064 (or 7056 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 23651040 is about 4863.2334922354. The cubic root of 23651040 is about 287.0450624690.

Adding to 23651040 its reverse (4015632), we get a palindrome (27666672).

The spelling of 23651040 in words is "twenty-three million, six hundred fifty-one thousand, forty".