23087778 has 64 divisors (see below), whose sum is σ = 55157760. Its totient is φ = 6305472.

The previous prime is 23087773. The next prime is 23087789. The reversal of 23087778 is 87778032.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (23087773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128893 + ... + 129071.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^23087778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23087778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27578880).

23087778 is an abundant number, since it is smaller than the sum of its proper divisors (32069982).

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

23087778 is a wasteful number, since it uses less digits than its factorization.

23087778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 23087778 is about 4804.9742975379. The cubic root of 23087778 is about 284.7480198158.

The spelling of 23087778 in words is "twenty-three million, eighty-seven thousand, seven hundred seventy-eight".