381578628 has 24 divisors (see below), whose sum is σ = 919072000. Its totient is φ = 123089760.

The previous prime is 381578621. The next prime is 381578647. The reversal of 381578628 is 826875183.

381578628 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (381578621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512503 + ... + 513246.

Almost surely, 2^381578628 is an apocalyptic number.

It is an amenable number.

381578628 is an abundant number, since it is smaller than the sum of its proper divisors (537493372).

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

381578628 is a wasteful number, since it uses less digits than its factorization.

381578628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025787 (or 1025785 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 381578628 is about 19534.0376778586. The cubic root of 381578628 is about 725.3172629674.

The spelling of 381578628 in words is "three hundred eighty-one million, five hundred seventy-eight thousand, six hundred twenty-eight".