23781828 has 24 divisors (see below), whose sum is σ = 63418432. Its totient is φ = 6794784.

The previous prime is 23781817. The next prime is 23781829. The reversal of 23781828 is 82818732.

It is not an unprimeable number, because it can be changed into a prime (23781829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141475 + ... + 141642.

Almost surely, 2^23781828 is an apocalyptic number.

23781828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

23781828 is an abundant number, since it is smaller than the sum of its proper divisors (39636604).

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

23781828 is a wasteful number, since it uses less digits than its factorization.

23781828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283131 (or 283129 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 23781828 is about 4876.6615629957. The cubic root of 23781828 is about 287.5732007684.

The spelling of 23781828 in words is "twenty-three million, seven hundred eighty-one thousand, eight hundred twenty-eight".