231378378 has 64 divisors (see below), whose sum is σ = 581852160. Its totient is φ = 60083760.

The previous prime is 231378361. The next prime is 231378397. The reversal of 231378378 is 873873132.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53833 + ... + 57971.

It is an arithmetic number, because the mean of its divisors is an integer number (9091440).

Almost surely, 2^231378378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231378378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290926080).

231378378 is an abundant number, since it is smaller than the sum of its proper divisors (350473782).

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

231378378 is a wasteful number, since it uses less digits than its factorization.

231378378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184 (or 4162 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 231378378 is about 15211.1267827206. The cubic root of 231378378 is about 613.9140754819.

The spelling of 231378378 in words is "two hundred thirty-one million, three hundred seventy-eight thousand, three hundred seventy-eight".