394990471542 has 32 divisors (see below), whose sum is σ = 807469420032. Its totient is φ = 128753469344.

The previous prime is 394990471531. The next prime is 394990471543. The reversal of 394990471542 is 245174099493.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394990471543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255273 + ... + 924740.

It is an arithmetic number, because the mean of its divisors is an integer number (25233419376).

Almost surely, 2^394990471542 is an apocalyptic number.

394990471542 is an abundant number, since it is smaller than the sum of its proper divisors (412478948490).

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

394990471542 is a wasteful number, since it uses less digits than its factorization.

394990471542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181252.

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 394990471542 in words is "three hundred ninety-four billion, nine hundred ninety million, four hundred seventy-one thousand, five hundred forty-two".