9940398355 has 16 divisors (see below), whose sum is σ = 12971512800. Its totient is φ = 7282248192.

The previous prime is 9940398343. The next prime is 9940398361. The reversal of 9940398355 is 5538930499.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9940398355 - 2⁷ = 9940398227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9940398296 and 9940398305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1577205 + ... + 1583494.

It is an arithmetic number, because the mean of its divisors is an integer number (810719550).

Almost surely, 2^9940398355 is an apocalyptic number.

9940398355 is a deficient number, since it is larger than the sum of its proper divisors (3031114445).

9940398355 is a wasteful number, since it uses less digits than its factorization.

9940398355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160758.

The product of its (nonzero) digits is 5248800, while the sum is 55.

The square root of 9940398355 is about 99701.5464022500. The cubic root of 9940398355 is about 2150.1458963551.

The spelling of 9940398355 in words is "nine billion, nine hundred forty million, three hundred ninety-eight thousand, three hundred fifty-five".