23278655 has 8 divisors (see below), whose sum is σ = 27967632. Its totient is φ = 18600768.

The previous prime is 23278621. The next prime is 23278657. The reversal of 23278655 is 55687232.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23278655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278657) 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, 2912 + ... + 7418.

It is an arithmetic number, because the mean of its divisors is an integer number (3495954).

Almost surely, 2^23278655 is an apocalyptic number.

23278655 is a deficient number, since it is larger than the sum of its proper divisors (4688977).

23278655 is a wasteful number, since it uses less digits than its factorization.

23278655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5545.

The product of its digits is 100800, while the sum is 38.

The square root of 23278655 is about 4824.7958506034. The cubic root of 23278655 is about 285.5305803013.

It can be divided in two parts, 232 and 78655, that added together give a palindrome (78887).

The spelling of 23278655 in words is "twenty-three million, two hundred seventy-eight thousand, six hundred fifty-five".