394143004815 has 32 divisors (see below), whose sum is σ = 722896098816. Its totient is φ = 179635294080.

The previous prime is 394143004799. The next prime is 394143004831. The reversal of 394143004815 is 518400341493.

It is an interprime number because it is at equal distance from previous prime (394143004799) and next prime (394143004831).

It is not a de Polignac number, because 394143004815 - 2⁴ = 394143004799 is a prime.

It is a super-2 number, since 2×394143004815² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5635552 + ... + 5705061.

It is an arithmetic number, because the mean of its divisors is an integer number (22590503088).

Almost surely, 2^394143004815 is an apocalyptic number.

394143004815 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

394143004815 is a deficient number, since it is larger than the sum of its proper divisors (328753094001).

394143004815 is a wasteful number, since it uses less digits than its factorization.

394143004815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11340959.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 394143004815 in words is "three hundred ninety-four billion, one hundred forty-three million, four thousand, eight hundred fifteen".