381946635 has 48 divisors (see below), whose sum is σ = 758025216. Its totient is φ = 174279744.

The previous prime is 381946601. The next prime is 381946639. The reversal of 381946635 is 536649183.

381946635 is a `hidden beast` number, since 3 + 8 + 1 + 9 + 4 + 6 + 635 = 666.

It is not a de Polignac number, because 381946635 - 2⁶ = 381946571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (381946639) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 278722 + ... + 280088.

It is an arithmetic number, because the mean of its divisors is an integer number (15792192).

Almost surely, 2^381946635 is an apocalyptic number.

381946635 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

381946635 is a deficient number, since it is larger than the sum of its proper divisors (376078581).

381946635 is a wasteful number, since it uses less digits than its factorization.

381946635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272 (or 2269 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 381946635 is about 19543.4550425456. The cubic root of 381946635 is about 725.5503613356.

The spelling of 381946635 in words is "three hundred eighty-one million, nine hundred forty-six thousand, six hundred thirty-five".