394663542 has 96 divisors (see below), whose sum is σ = 1021031424. Its totient is φ = 100699200.

The previous prime is 394663519. The next prime is 394663553. The reversal of 394663542 is 245366493.

It is a super-2 number, since 2×394663542² = 311518622767971528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 394663494 and 394663503.

It is a congruent number.

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, 116817 + ... + 120147.

It is an arithmetic number, because the mean of its divisors is an integer number (10635744).

Almost surely, 2^394663542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394663542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510515712).

394663542 is an abundant number, since it is smaller than the sum of its proper divisors (626367882).

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

394663542 is a wasteful number, since it uses less digits than its factorization.

394663542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394 (or 3387 counting only the distinct ones).

The product of its digits is 466560, while the sum is 42.

The square root of 394663542 is about 19866.1405914687. The cubic root of 394663542 is about 733.5150062750.

The spelling of 394663542 in words is "three hundred ninety-four million, six hundred sixty-three thousand, five hundred forty-two".