381099000 has 64 divisors (see below), whose sum is σ = 1189038240. Its totient is φ = 101625600.

The previous prime is 381098999. The next prime is 381099007. The reversal of 381099000 is 990183.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381099007) 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, 60517 + ... + 66516.

Almost surely, 2^381099000 is an apocalyptic number.

381099000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381099000 is an abundant number, since it is smaller than the sum of its proper divisors (807939240).

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

381099000 is a wasteful number, since it uses less digits than its factorization.

381099000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127057 (or 127043 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 381099000 is about 19521.7570930488. The cubic root of 381099000 is about 725.0132379668.

The spelling of 381099000 in words is "three hundred eighty-one million, ninety-nine thousand".