393650442 has 20 divisors (see below), whose sum is σ = 882068946. Its totient is φ = 131216760.

The previous prime is 393650441. The next prime is 393650449. The reversal of 393650442 is 244056393.

It can be written as a sum of positive squares in only one way, i.e., 346741641 + 46908801 = 18621^2 + 6849^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 393650397 and 393650406.

It is not an unprimeable number, because it can be changed into a prime (393650441) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1214809 + ... + 1215132.

Almost surely, 2^393650442 is an apocalyptic number.

393650442 is an abundant number, since it is smaller than the sum of its proper divisors (488418504).

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

393650442 is a wasteful number, since it uses less digits than its factorization.

393650442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429955 (or 2429946 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 393650442 is about 19840.6260485903. The cubic root of 393650442 is about 732.8868249275.

The spelling of 393650442 in words is "three hundred ninety-three million, six hundred fifty thousand, four hundred forty-two".