23751040 has 128 divisors (see below), whose sum is σ = 62791200. Its totient is φ = 8552448.

The previous prime is 23751011. The next prime is 23751043. The reversal of 23751040 is 4015732.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×23751040² = 1128223802163200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23751043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402531 + ... + 402589.

Almost surely, 2^23751040 is an apocalyptic number.

23751040 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 23751040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31395600).

23751040 is an abundant number, since it is smaller than the sum of its proper divisors (39040160).

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

23751040 is a wasteful number, since it uses less digits than its factorization.

23751040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 23751040 is about 4873.5038729850. The cubic root of 23751040 is about 287.4490495723.

Adding to 23751040 its reverse (4015732), we get a palindrome (27766772).

The spelling of 23751040 in words is "twenty-three million, seven hundred fifty-one thousand, forty".