394790998542 has 16 divisors (see below), whose sum is σ = 790197431040. Its totient is φ = 131494427192.

The previous prime is 394790998523. The next prime is 394790998549. The reversal of 394790998542 is 245899097493.

It is a super-2 number, since 2×394790998542² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394790998549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25634742 + ... + 25650137.

It is an arithmetic number, because the mean of its divisors is an integer number (49387339440).

Almost surely, 2^394790998542 is an apocalyptic number.

394790998542 is an abundant number, since it is smaller than the sum of its proper divisors (395406432498).

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

394790998542 is a wasteful number, since it uses less digits than its factorization.

394790998542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51286167.

The product of its (nonzero) digits is 176359680, while the sum is 69.

The spelling of 394790998542 in words is "three hundred ninety-four billion, seven hundred ninety million, nine hundred ninety-eight thousand, five hundred forty-two".