394135428 has 24 divisors (see below), whose sum is σ = 921316032. Its totient is φ = 131140384.

The previous prime is 394135421. The next prime is 394135447. The reversal of 394135428 is 824531493.

It is not an unprimeable number, because it can be changed into a prime (394135421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22800 + ... + 36167.

It is an arithmetic number, because the mean of its divisors is an integer number (38388168).

Almost surely, 2^394135428 is an apocalyptic number.

It is an amenable number.

394135428 is an abundant number, since it is smaller than the sum of its proper divisors (527180604).

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

394135428 is a wasteful number, since it uses less digits than its factorization.

394135428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59531 (or 59529 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 394135428 is about 19852.8443302213. The cubic root of 394135428 is about 733.1876789693.

The spelling of 394135428 in words is "three hundred ninety-four million, one hundred thirty-five thousand, four hundred twenty-eight".