394662240 has 384 divisors, whose sum is σ = 1633443840. Its totient is φ = 87091200.

The previous prime is 394662217. The next prime is 394662241. The reversal of 394662240 is 42266493.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 394662195 and 394662204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394662241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 937230 + ... + 937650.

It is an arithmetic number, because the mean of its divisors is an integer number (4253760).

Almost surely, 2^394662240 is an apocalyptic number.

394662240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394662240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816721920).

394662240 is an abundant number, since it is smaller than the sum of its proper divisors (1238781600).

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

394662240 is a wasteful number, since it uses less digits than its factorization.

394662240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 394662240 is about 19866.1078221175. The cubic root of 394662240 is about 733.5141996490.

The spelling of 394662240 in words is "three hundred ninety-four million, six hundred sixty-two thousand, two hundred forty".