23670440 has 64 divisors (see below), whose sum is σ = 55242000. Its totient is φ = 9123840.

The previous prime is 23670421. The next prime is 23670463. The reversal of 23670440 is 4407632.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2748964 + 20921476 = 1658^2 + 4574^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217106 + ... + 217214.

Almost surely, 2^23670440 is an apocalyptic number.

23670440 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 23670440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27621000).

23670440 is an abundant number, since it is smaller than the sum of its proper divisors (31571560).

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

23670440 is a wasteful number, since it uses less digits than its factorization.

23670440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 23670440 is about 4865.2276411284. The cubic root of 23670440 is about 287.1235248724.

The spelling of 23670440 in words is "twenty-three million, six hundred seventy thousand, four hundred forty".