393044890 has 16 divisors (see below), whose sum is σ = 808549632. Its totient is φ = 134758224.

The previous prime is 393044863. The next prime is 393044893. The reversal of 393044890 is 98440393.

It is a super-2 number, since 2×393044890² = 308968571110224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (393044893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2807394 + ... + 2807533.

It is an arithmetic number, because the mean of its divisors is an integer number (50534352).

Almost surely, 2^393044890 is an apocalyptic number.

393044890 is an abundant number, since it is smaller than the sum of its proper divisors (415504742).

393044890 is a wasteful number, since it uses less digits than its factorization.

393044890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5614941.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 393044890 is about 19825.3597697495. The cubic root of 393044890 is about 732.5108324257.

The spelling of 393044890 in words is "three hundred ninety-three million, forty-four thousand, eight hundred ninety".