23919140 has 24 divisors (see below), whose sum is σ = 57406272. Its totient is φ = 8200800.

The previous prime is 23919139. The next prime is 23919143. The reversal of 23919140 is 4191932.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (23919143) 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 7 ways as a sum of consecutive naturals, for example, 85286 + ... + 85565.

It is an arithmetic number, because the mean of its divisors is an integer number (2391928).

Almost surely, 2^23919140 is an apocalyptic number.

23919140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23919140 is an abundant number, since it is smaller than the sum of its proper divisors (33487132).

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

23919140 is a wasteful number, since it uses less digits than its factorization.

23919140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170867 (or 170865 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 23919140 is about 4890.7197834266. The cubic root of 23919140 is about 288.1256042920.

The spelling of 23919140 in words is "twenty-three million, nine hundred nineteen thousand, one hundred forty".