381620196 has 18 divisors (see below), whose sum is σ = 964651142. Its totient is φ = 127206720.

The previous prime is 381620177. The next prime is 381620203. The reversal of 381620196 is 691026183.

It can be written as a sum of positive squares in only one way, i.e., 291180096 + 90440100 = 17064^2 + 9510^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 10600561 = 381620196 / (3 + 8 + 1 + 6 + 2 + 0 + 1 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 381620196.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5300245 + ... + 5300316.

Almost surely, 2^381620196 is an apocalyptic number.

381620196 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

381620196 is an abundant number, since it is smaller than the sum of its proper divisors (583030946).

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

381620196 is a wasteful number, since it uses less digits than its factorization.

381620196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600571 (or 10600566 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 381620196 is about 19535.1016378211. The cubic root of 381620196 is about 725.3435999537.

The spelling of 381620196 in words is "three hundred eighty-one million, six hundred twenty thousand, one hundred ninety-six".