23212040 has 16 divisors (see below), whose sum is σ = 52227180. Its totient is φ = 9284800.

The previous prime is 23212009. The next prime is 23212051. The reversal of 23212040 is 4021232.

It can be written as a sum of positive squares in 2 ways, for example, as 22600516 + 611524 = 4754^2 + 782^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290111 + ... + 290190.

Almost surely, 2^23212040 is an apocalyptic number.

23212040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23212040 is an abundant number, since it is smaller than the sum of its proper divisors (29015140).

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

23212040 is a wasteful number, since it uses less digits than its factorization.

23212040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580312 (or 580308 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 23212040 is about 4817.8875038755. The cubic root of 23212040 is about 285.2579587107.

Adding to 23212040 its reverse (4021232), we get a palindrome (27233272).

The spelling of 23212040 in words is "twenty-three million, two hundred twelve thousand, forty".