394289770 has 48 divisors (see below), whose sum is σ = 833017608. Its totient is φ = 133969920.

The previous prime is 394289761. The next prime is 394289773. The reversal of 394289770 is 77982493.

It can be written as a sum of positive squares in 4 ways, for example, as 78907689 + 315382081 = 8883^2 + 17759^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (394289773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51810 + ... + 58930.

Almost surely, 2^394289770 is an apocalyptic number.

394289770 is an abundant number, since it is smaller than the sum of its proper divisors (438727838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394289770 is a wasteful number, since it uses less digits than its factorization.

394289770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7255 (or 7248 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 394289770 is about 19856.7311005613. The cubic root of 394289770 is about 733.2833710222.

The spelling of 394289770 in words is "three hundred ninety-four million, two hundred eighty-nine thousand, seven hundred seventy".