383505406 has 4 divisors (see below), whose sum is σ = 575258112. Its totient is φ = 191752702.

The previous prime is 383505391. The next prime is 383505413. The reversal of 383505406 is 604505383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604505383 = 6101 ⋅99083.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95876350 + ... + 95876353.

It is an arithmetic number, because the mean of its divisors is an integer number (143814528).

Almost surely, 2^383505406 is an apocalyptic number.

383505406 is a deficient number, since it is larger than the sum of its proper divisors (191752706).

383505406 is a wasteful number, since it uses less digits than its factorization.

383505406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191752705.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 383505406 is about 19583.2940538613. The cubic root of 383505406 is about 726.5360416196.

The spelling of 383505406 in words is "three hundred eighty-three million, five hundred five thousand, four hundred six".