23250440 has 16 divisors (see below), whose sum is σ = 52313580. Its totient is φ = 9300160.

The previous prime is 23250439. The next prime is 23250473. The reversal of 23250440 is 4405232.

It can be written as a sum of positive squares in 2 ways, for example, as 22486564 + 763876 = 4742^2 + 874^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290591 + ... + 290670.

Almost surely, 2^23250440 is an apocalyptic number.

23250440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23250440 is an abundant number, since it is smaller than the sum of its proper divisors (29063140).

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

23250440 is a wasteful number, since it uses less digits than its factorization.

23250440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581272 (or 581268 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 23250440 is about 4821.8710061552. The cubic root of 23250440 is about 285.4151741150.

Adding to 23250440 its reverse (4405232), we get a palindrome (27655672).

The spelling of 23250440 in words is "twenty-three million, two hundred fifty thousand, four hundred forty".