494139558 has 24 divisors (see below), whose sum is σ = 1086291864. Its totient is φ = 149739040.

The previous prime is 494139557. The next prime is 494139559. The reversal of 494139558 is 855931494.

It is an interprime number because it is at equal distance from previous prime (494139557) and next prime (494139559).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494139557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339591 + ... + 341042.

It is an arithmetic number, because the mean of its divisors is an integer number (45262161).

Almost surely, 2^494139558 is an apocalyptic number.

494139558 is an abundant number, since it is smaller than the sum of its proper divisors (592152306).

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

494139558 is a wasteful number, since it uses less digits than its factorization.

494139558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680660 (or 680649 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The square root of 494139558 is about 22229.2500548264. The cubic root of 494139558 is about 790.5873738868.

The spelling of 494139558 in words is "four hundred ninety-four million, one hundred thirty-nine thousand, five hundred fifty-eight".