394998920 has 32 divisors (see below), whose sum is σ = 910428120. Its totient is φ = 154145280.

The previous prime is 394998917. The next prime is 394998949. The reversal of 394998920 is 29899493.

It can be written as a sum of positive squares in 4 ways, for example, as 99640324 + 295358596 = 9982^2 + 17186^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118787 + ... + 122066.

Almost surely, 2^394998920 is an apocalyptic number.

It is an amenable number.

394998920 is an abundant number, since it is smaller than the sum of its proper divisors (515429200).

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

394998920 is a wasteful number, since it uses less digits than its factorization.

394998920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240905 (or 240901 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 394998920 is about 19874.5797439845. The cubic root of 394998920 is about 733.7227234137.

The spelling of 394998920 in words is "three hundred ninety-four million, nine hundred ninety-eight thousand, nine hundred twenty".