23849840 has 40 divisors (see below), whose sum is σ = 63373920. Its totient is φ = 8176896.

The previous prime is 23849831. The next prime is 23849849. The reversal of 23849840 is 4894832.

It is an interprime number because it is at equal distance from previous prime (23849831) and next prime (23849849).

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

It is a junction number, because it is equal to n+sod(n) for n = 23849794 and 23849803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23849849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20735 + ... + 21854.

It is an arithmetic number, because the mean of its divisors is an integer number (1584348).

Almost surely, 2^23849840 is an apocalyptic number.

23849840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23849840 is an abundant number, since it is smaller than the sum of its proper divisors (39524080).

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

23849840 is a wasteful number, since it uses less digits than its factorization.

23849840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42609 (or 42603 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 23849840 is about 4883.6297975993. The cubic root of 23849840 is about 287.8470767364.

The spelling of 23849840 in words is "twenty-three million, eight hundred forty-nine thousand, eight hundred forty".