852139494 has 16 divisors (see below), whose sum is σ = 1893643440. Its totient is φ = 284046480.

The previous prime is 852139487. The next prime is 852139507. The reversal of 852139494 is 494931258.

852139494 is a `hidden beast` number, since 8 + 521 + 39 + 4 + 94 = 666.

It is a super-2 number, since 2×852139494² = 1452283434469152072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7890127 + ... + 7890234.

It is an arithmetic number, because the mean of its divisors is an integer number (118352715).

Almost surely, 2^852139494 is an apocalyptic number.

852139494 is an abundant number, since it is smaller than the sum of its proper divisors (1041503946).

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

852139494 is a wasteful number, since it uses less digits than its factorization.

852139494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15780372 (or 15780366 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 852139494 is about 29191.4284337029. The cubic root of 852139494 is about 948.0623456834.

The spelling of 852139494 in words is "eight hundred fifty-two million, one hundred thirty-nine thousand, four hundred ninety-four".