394851620 has 24 divisors (see below), whose sum is σ = 831579000. Its totient is φ = 157485312.

The previous prime is 394851593. The next prime is 394851623. The reversal of 394851620 is 26158493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 184253476 + 210598144 = 13574^2 + 14512^2 .

It is not an unprimeable number, because it can be changed into a prime (394851623) 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, 21305 + ... + 35264.

It is an arithmetic number, because the mean of its divisors is an integer number (34649125).

Almost surely, 2^394851620 is an apocalyptic number.

It is an amenable number.

394851620 is an abundant number, since it is smaller than the sum of its proper divisors (436727380).

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

394851620 is a wasteful number, since it uses less digits than its factorization.

394851620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56927 (or 56925 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 394851620 is about 19870.8736597061. The cubic root of 394851620 is about 733.6315073041.

The spelling of 394851620 in words is "three hundred ninety-four million, eight hundred fifty-one thousand, six hundred twenty".