23284781 has 8 divisors (see below), whose sum is σ = 26551224. Its totient is φ = 20229120.

The previous prime is 23284777. The next prime is 23284783. The reversal of 23284781 is 18748232.

It can be written as a sum of positive squares in 4 ways, for example, as 6400900 + 16883881 = 2530^2 + 4109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23284781 - 2² = 23284777 is a prime.

It is a super-2 number, since 2×23284781² = 1084362052435922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23284783) 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, 52460 + ... + 52901.

It is an arithmetic number, because the mean of its divisors is an integer number (3318903).

Almost surely, 2^23284781 is an apocalyptic number.

It is an amenable number.

23284781 is a deficient number, since it is larger than the sum of its proper divisors (3266443).

23284781 is a wasteful number, since it uses less digits than its factorization.

23284781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105391.

The product of its digits is 21504, while the sum is 35.

The square root of 23284781 is about 4825.4306543561. The cubic root of 23284781 is about 285.5556248027. Note that the first 3 decimals are identical.

The spelling of 23284781 in words is "twenty-three million, two hundred eighty-four thousand, seven hundred eighty-one".