23947140 has 192 divisors, whose sum is σ = 83349504. Its totient is φ = 5018112.

The previous prime is 23947129. The next prime is 23947153. The reversal of 23947140 is 4174932.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23947098 and 23947107.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 357387 + ... + 357453.

It is an arithmetic number, because the mean of its divisors is an integer number (434112).

Almost surely, 2^23947140 is an apocalyptic number.

23947140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23947140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41674752).

23947140 is an abundant number, since it is smaller than the sum of its proper divisors (59402364).

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

23947140 is a wasteful number, since it uses less digits than its factorization.

23947140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 23947140 is about 4893.5815105095. The cubic root of 23947140 is about 288.2379880844.

The spelling of 23947140 in words is "twenty-three million, nine hundred forty-seven thousand, one hundred forty".