381402807 has 4 divisors (see below), whose sum is σ = 508537080. Its totient is φ = 254268536.

The previous prime is 381402799. The next prime is 381402811. The reversal of 381402807 is 708204183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381402807 - 2³ = 381402799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381402817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63567132 + ... + 63567137.

It is an arithmetic number, because the mean of its divisors is an integer number (127134270).

Almost surely, 2^381402807 is an apocalyptic number.

381402807 is a deficient number, since it is larger than the sum of its proper divisors (127134273).

381402807 is a wasteful number, since it uses less digits than its factorization.

381402807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127134272.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 381402807 is about 19529.5367840612. The cubic root of 381402807 is about 725.2058437308.

The spelling of 381402807 in words is "three hundred eighty-one million, four hundred two thousand, eight hundred seven".