381433637 has 8 divisors (see below), whose sum is σ = 410930520. Its totient is φ = 351959040.

The previous prime is 381433631. The next prime is 381433639. The reversal of 381433637 is 736334183.

It can be written as a sum of positive squares in 4 ways, for example, as 122899396 + 258534241 = 11086^2 + 16079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381433637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381433637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381433631) 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, 52337 + ... + 59177.

It is an arithmetic number, because the mean of its divisors is an integer number (51366315).

Almost surely, 2^381433637 is an apocalyptic number.

It is an amenable number.

381433637 is a deficient number, since it is larger than the sum of its proper divisors (29496883).

381433637 is a wasteful number, since it uses less digits than its factorization.

381433637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11143.

The product of its digits is 108864, while the sum is 38.

The square root of 381433637 is about 19530.3260853474. The cubic root of 381433637 is about 725.2253834347.

The spelling of 381433637 in words is "three hundred eighty-one million, four hundred thirty-three thousand, six hundred thirty-seven".