394989120 has 336 divisors, whose sum is σ = 1454993280. Its totient is φ = 98131968.

The previous prime is 394989107. The next prime is 394989139. The reversal of 394989120 is 21989493.

394989120 is a `hidden beast` number, since 39 + 498 + 9 + 120 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4438036 + ... + 4438124.

Almost surely, 2^394989120 is an apocalyptic number.

394989120 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 394989120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727496640).

394989120 is an abundant number, since it is smaller than the sum of its proper divisors (1060004160).

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

394989120 is a wasteful number, since it uses less digits than its factorization.

394989120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 394989120 is about 19874.3331963616. Note that the first 3 decimals coincide. The cubic root of 394989120 is about 733.7166554291.

The spelling of 394989120 in words is "three hundred ninety-four million, nine hundred eighty-nine thousand, one hundred twenty".