393220436985 has 24 divisors (see below), whose sum is σ = 687952025280. Its totient is φ = 207757586592.

The previous prime is 393220436969. The next prime is 393220437007. The reversal of 393220436985 is 589634022393.

It is a happy number.

It is not a de Polignac number, because 393220436985 - 2⁴ = 393220436969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40828045 + ... + 40837674.

It is an arithmetic number, because the mean of its divisors is an integer number (28664667720).

Almost surely, 2^393220436985 is an apocalyptic number.

It is an amenable number.

393220436985 is a deficient number, since it is larger than the sum of its proper divisors (294731588295).

393220436985 is a wasteful number, since it uses less digits than its factorization.

393220436985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81665837 (or 81665834 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 54.

The spelling of 393220436985 in words is "three hundred ninety-three billion, two hundred twenty million, four hundred thirty-six thousand, nine hundred eighty-five".