381660802 has 4 divisors (see below), whose sum is σ = 572491206. Its totient is φ = 190830400.

The previous prime is 381660787. The next prime is 381660803. The reversal of 381660802 is 208066183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 208066183 = 13 ⋅16005091.

It can be written as a sum of positive squares in only one way, i.e., 381069441 + 591361 = 19521^2 + 769^2 .

It is not an unprimeable number, because it can be changed into a prime (381660803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95415199 + ... + 95415202.

Almost surely, 2^381660802 is an apocalyptic number.

381660802 is a deficient number, since it is larger than the sum of its proper divisors (190830404).

381660802 is a wasteful number, since it uses less digits than its factorization.

381660802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190830403.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 381660802 is about 19536.1409188202. The cubic root of 381660802 is about 725.3693255817.

The spelling of 381660802 in words is "three hundred eighty-one million, six hundred sixty thousand, eight hundred two".