394253095690 has 16 divisors (see below), whose sum is σ = 751400017992. Its totient is φ = 148424694784.

The previous prime is 394253095661. The next prime is 394253095693. The reversal of 394253095690 is 96590352493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 308217059929 + 86036035761 = 555173^2 + 293319^2 .

It is a super-2 number, since 2×394253095690² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394253095693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1159567759 + ... + 1159568098.

Almost surely, 2^394253095690 is an apocalyptic number.

394253095690 is a deficient number, since it is larger than the sum of its proper divisors (357146922302).

394253095690 is a wasteful number, since it uses less digits than its factorization.

394253095690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319135881.

The product of its (nonzero) digits is 7873200, while the sum is 55.

The spelling of 394253095690 in words is "three hundred ninety-four billion, two hundred fifty-three million, ninety-five thousand, six hundred ninety".