381178464 has 48 divisors (see below), whose sum is σ = 1002964032. Its totient is φ = 126758528.

The previous prime is 381178453. The next prime is 381178487. The reversal of 381178464 is 464871183.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-4 number, since 4×381178464⁴ (a number of 35 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38047 + ... + 47009.

It is an arithmetic number, because the mean of its divisors is an integer number (20895084).

Almost surely, 2^381178464 is an apocalyptic number.

It is an amenable number.

381178464 is an abundant number, since it is smaller than the sum of its proper divisors (621785568).

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

381178464 is a wasteful number, since it uses less digits than its factorization.

381178464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9419 (or 9411 counting only the distinct ones).

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

The square root of 381178464 is about 19523.7922545801. The cubic root of 381178464 is about 725.0636259658.

The spelling of 381178464 in words is "three hundred eighty-one million, one hundred seventy-eight thousand, four hundred sixty-four".