381000145800 has 48 divisors (see below), whose sum is σ = 1181100453840. Its totient is φ = 101600038720.

The previous prime is 381000145793. The next prime is 381000145829. The reversal of 381000145800 is 8541000183.

It is a super-2 number, since 2×381000145800² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317499522 + ... + 317500721.

It is an arithmetic number, because the mean of its divisors is an integer number (24606259455).

Almost surely, 2^381000145800 is an apocalyptic number.

381000145800 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381000145800 is an abundant number, since it is smaller than the sum of its proper divisors (800100308040).

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

381000145800 is a wasteful number, since it uses less digits than its factorization.

381000145800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635000262 (or 635000253 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 381000145800 its reverse (8541000183), we get a palindrome (389541145983).

The spelling of 381000145800 in words is "three hundred eighty-one billion, one hundred forty-five thousand, eight hundred".