381223878 has 32 divisors (see below), whose sum is σ = 922627584. Its totient is φ = 102513792.

The previous prime is 381223877. The next prime is 381223889. The reversal of 381223878 is 878322183.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381223877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266250 + ... + 267677.

It is an arithmetic number, because the mean of its divisors is an integer number (28832112).

Almost surely, 2^381223878 is an apocalyptic number.

381223878 is an abundant number, since it is smaller than the sum of its proper divisors (541403706).

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

381223878 is a wasteful number, since it uses less digits than its factorization.

381223878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533956.

The product of its digits is 129024, while the sum is 42.

The square root of 381223878 is about 19524.9552624327. The cubic root of 381223878 is about 725.0924197680.

The spelling of 381223878 in words is "three hundred eighty-one million, two hundred twenty-three thousand, eight hundred seventy-eight".