23578740 has 72 divisors (see below), whose sum is σ = 74004840. Its totient is φ = 6069504.

The previous prime is 23578729. The next prime is 23578741. The reversal of 23578740 is 4787532.

It can be written as a sum of positive squares in 4 ways, for example, as 17424 + 23561316 = 132^2 + 4854^2 .

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 = 23578695 and 23578704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23578741) 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 23 ways as a sum of consecutive naturals, for example, 2962 + ... + 7478.

It is an arithmetic number, because the mean of its divisors is an integer number (1027845).

Almost surely, 2^23578740 is an apocalyptic number.

23578740 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 23578740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37002420).

23578740 is an abundant number, since it is smaller than the sum of its proper divisors (50426100).

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

23578740 is a wasteful number, since it uses less digits than its factorization.

23578740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4561 (or 4556 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 23578740 is about 4855.7944767051. The cubic root of 23578740 is about 286.7522699700.

The spelling of 23578740 in words is "twenty-three million, five hundred seventy-eight thousand, seven hundred forty".