23351840 has 24 divisors (see below), whose sum is σ = 55169100. Its totient is φ = 9340672.

The previous prime is 23351827. The next prime is 23351849. The reversal of 23351840 is 4815332.

It can be written as a sum of positive squares in 2 ways, for example, as 21196816 + 2155024 = 4604^2 + 1468^2 .

It is not an unprimeable number, because it can be changed into a prime (23351849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72815 + ... + 73134.

Almost surely, 2^23351840 is an apocalyptic number.

23351840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23351840 is an abundant number, since it is smaller than the sum of its proper divisors (31817260).

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

23351840 is a wasteful number, since it uses less digits than its factorization.

23351840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145964 (or 145956 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 23351840 is about 4832.3741576993. The cubic root of 23351840 is about 285.8294906840.

The spelling of 23351840 in words is "twenty-three million, three hundred fifty-one thousand, eight hundred forty".