23278032 has 120 divisors (see below), whose sum is σ = 71118216. Its totient is φ = 7077888.

The previous prime is 23277967. The next prime is 23278033. The reversal of 23278032 is 23087232.

It can be written as a sum of positive squares in 4 ways, for example, as 18455616 + 4822416 = 4296^2 + 2196^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23277987 and 23278005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90448 + ... + 90704.

Almost surely, 2^23278032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23278032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35559108).

23278032 is an abundant number, since it is smaller than the sum of its proper divisors (47840184).

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

23278032 is a wasteful number, since it uses less digits than its factorization.

23278032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 23278032 is about 4824.7312878543. The cubic root of 23278032 is about 285.5280330874.

The spelling of 23278032 in words is "twenty-three million, two hundred seventy-eight thousand, thirty-two".