23240040 has 64 divisors (see below), whose sum is σ = 73396800. Its totient is φ = 5870592.

The previous prime is 23240039. The next prime is 23240101. The reversal of 23240040 is 4004232.

It is a happy number.

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

It is a congruent number.

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, 2817 + ... + 7376.

It is an arithmetic number, because the mean of its divisors is an integer number (1146825).

Almost surely, 2^23240040 is an apocalyptic number.

23240040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23240040 is an abundant number, since it is smaller than the sum of its proper divisors (50156760).

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

23240040 is a wasteful number, since it uses less digits than its factorization.

23240040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226 (or 10222 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 23240040 is about 4820.7924659749. The cubic root of 23240040 is about 285.3726120459.

Adding to 23240040 its reverse (4004232), we get a palindrome (27244272).

The spelling of 23240040 in words is "twenty-three million, two hundred forty thousand, forty".