23949540 has 48 divisors (see below), whose sum is σ = 74511360. Its totient is φ = 6386400.

The previous prime is 23949511. The next prime is 23949547. The reversal of 23949540 is 4594932.

23949540 is a `hidden beast` number, since 23 + 94 + 9 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23949495 and 23949504.

It is not an unprimeable number, because it can be changed into a prime (23949547) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 21636 + ... + 22715.

It is an arithmetic number, because the mean of its divisors is an integer number (1552320).

Almost surely, 2^23949540 is an apocalyptic number.

23949540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23949540 is an abundant number, since it is smaller than the sum of its proper divisors (50561820).

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

23949540 is a wasteful number, since it uses less digits than its factorization.

23949540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44369 (or 44361 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 23949540 is about 4893.8267235365. The cubic root of 23949540 is about 288.2476169038.

The spelling of 23949540 in words is "twenty-three million, nine hundred forty-nine thousand, five hundred forty".