85139398 has 16 divisors (see below), whose sum is σ = 131850576. Its totient is φ = 41207040.

The previous prime is 85139371. The next prime is 85139401. The reversal of 85139398 is 89393158.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5338 + ... + 14098.

It is an arithmetic number, because the mean of its divisors is an integer number (8240661).

Almost surely, 2^85139398 is an apocalyptic number.

85139398 is a deficient number, since it is larger than the sum of its proper divisors (46711178).

85139398 is a wasteful number, since it uses less digits than its factorization.

85139398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8919.

The product of its digits is 233280, while the sum is 46.

The square root of 85139398 is about 9227.1012782997. The cubic root of 85139398 is about 439.9231925159.

The spelling of 85139398 in words is "eighty-five million, one hundred thirty-nine thousand, three hundred ninety-eight".