404993509390 has 16 divisors (see below), whose sum is σ = 729039071232. Its totient is φ = 161986125024.

The previous prime is 404993509331. The next prime is 404993509423. The reversal of 404993509390 is 93905399404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1258254 + ... + 1546993.

It is an arithmetic number, because the mean of its divisors is an integer number (45564941952).

Almost surely, 2^404993509390 is an apocalyptic number.

404993509390 is a deficient number, since it is larger than the sum of its proper divisors (324045561842).

404993509390 is a wasteful number, since it uses less digits than its factorization.

404993509390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819691.

The product of its (nonzero) digits is 4723920, while the sum is 55.

The spelling of 404993509390 in words is "four hundred four billion, nine hundred ninety-three million, five hundred nine thousand, three hundred ninety".