23481240 has 32 divisors (see below), whose sum is σ = 70444080. Its totient is φ = 6261632.

The previous prime is 23481239. The next prime is 23481251. The reversal of 23481240 is 4218432.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23481240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97719 + ... + 97958.

Almost surely, 2^23481240 is an apocalyptic number.

23481240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23481240 is an abundant number, since it is smaller than the sum of its proper divisors (46962840).

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

23481240 is a wasteful number, since it uses less digits than its factorization.

23481240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195691 (or 195687 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 23481240 is about 4845.7445248383. The cubic root of 23481240 is about 286.3564759656.

Adding to 23481240 its reverse (4218432), we get a palindrome (27699672).

The spelling of 23481240 in words is "twenty-three million, four hundred eighty-one thousand, two hundred forty".