23312040 has 32 divisors (see below), whose sum is σ = 69936480. Its totient is φ = 6216512.

The previous prime is 23312017. The next prime is 23312053. The reversal of 23312040 is 4021332.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 97014 + ... + 97253.

It is an arithmetic number, because the mean of its divisors is an integer number (2185515).

Almost surely, 2^23312040 is an apocalyptic number.

23312040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23312040 is an abundant number, since it is smaller than the sum of its proper divisors (46624440).

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

23312040 is a wasteful number, since it uses less digits than its factorization.

23312040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194281 (or 194277 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23312040 is about 4828.2543429277. The cubic root of 23312040 is about 285.6670126550.

Adding to 23312040 its reverse (4021332), we get a palindrome (27333372).

It can be divided in two parts, 2331 and 2040, that added together give a triangular number (4371 = T₉₃).

The spelling of 23312040 in words is "twenty-three million, three hundred twelve thousand, forty".