23681490 has 64 divisors (see below), whose sum is σ = 67792896. Its totient is φ = 5176512.

The previous prime is 23681473. The next prime is 23681491. The reversal of 23681490 is 9418632.

It is not an unprimeable number, because it can be changed into a prime (23681491) 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 31 ways as a sum of consecutive naturals, for example, 2379 + ... + 7281.

It is an arithmetic number, because the mean of its divisors is an integer number (1059264).

Almost surely, 2^23681490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23681490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33896448).

23681490 is an abundant number, since it is smaller than the sum of its proper divisors (44111406).

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

23681490 is a wasteful number, since it uses less digits than its factorization.

23681490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 23681490 is about 4866.3631183873. The cubic root of 23681490 is about 287.1681969243.

The spelling of 23681490 in words is "twenty-three million, six hundred eighty-one thousand, four hundred ninety".