23205040 has 40 divisors (see below), whose sum is σ = 54157248. Its totient is φ = 9246720.

The previous prime is 23205011. The next prime is 23205067. The reversal of 23205040 is 4050232.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34144 + ... + 34816.

Almost surely, 2^23205040 is an apocalyptic number.

23205040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23205040 is an abundant number, since it is smaller than the sum of its proper divisors (30952208).

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

23205040 is a wasteful number, since it uses less digits than its factorization.

23205040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 23205040 is about 4817.1609896286. The cubic root of 23205040 is about 285.2292809718.

Adding to 23205040 its reverse (4050232), we get a palindrome (27255272).

The spelling of 23205040 in words is "twenty-three million, two hundred five thousand, forty".