23778378 has 48 divisors (see below), whose sum is σ = 55831776. Its totient is φ = 7270560.

The previous prime is 23778373. The next prime is 23778379. The reversal of 23778378 is 87387732.

It is a super-3 number, since 3×23778378³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (23778373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71673 + ... + 72003.

It is an arithmetic number, because the mean of its divisors is an integer number (1163162).

Almost surely, 2^23778378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23778378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27915888).

23778378 is an abundant number, since it is smaller than the sum of its proper divisors (32053398).

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

23778378 is a wasteful number, since it uses less digits than its factorization.

23778378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 656 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 23778378 is about 4876.3078245738. The cubic root of 23778378 is about 287.5592941345.

The spelling of 23778378 in words is "twenty-three million, seven hundred seventy-eight thousand, three hundred seventy-eight".