394731842550 has 48 divisors (see below), whose sum is σ = 1036519386192. Its totient is φ = 99069952000.

The previous prime is 394731842521. The next prime is 394731842551. The reversal of 394731842550 is 55248137493.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 394731842493 and 394731842502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394731842551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77395851 + ... + 77400950.

It is an arithmetic number, because the mean of its divisors is an integer number (21594153879).

Almost surely, 2^394731842550 is an apocalyptic number.

394731842550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

394731842550 is an abundant number, since it is smaller than the sum of its proper divisors (641787543642).

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

394731842550 is a wasteful number, since it uses less digits than its factorization.

394731842550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154796833 (or 154796828 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 394731842550 in words is "three hundred ninety-four billion, seven hundred thirty-one million, eight hundred forty-two thousand, five hundred fifty".