23451240 has 32 divisors (see below), whose sum is σ = 70354080. Its totient is φ = 6253632.

The previous prime is 23451223. The next prime is 23451257. The reversal of 23451240 is 4215432.

It is an interprime number because it is at equal distance from previous prime (23451223) and next prime (23451257).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 97594 + ... + 97833.

It is an arithmetic number, because the mean of its divisors is an integer number (2198565).

Almost surely, 2^23451240 is an apocalyptic number.

23451240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23451240 is an abundant number, since it is smaller than the sum of its proper divisors (46902840).

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

23451240 is a wasteful number, since it uses less digits than its factorization.

23451240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195441 (or 195437 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 23451240 is about 4842.6480359407. The cubic root of 23451240 is about 286.2344728202.

Adding to 23451240 its reverse (4215432), we get a palindrome (27666672).

The spelling of 23451240 in words is "twenty-three million, four hundred fifty-one thousand, two hundred forty".