85397078428 has 12 divisors (see below), whose sum is σ = 150924540312. Its totient is φ = 42275781200.

The previous prime is 85397078407. The next prime is 85397078453. The reversal of 85397078428 is 82487079358.

It is a super-2 number, since 2×85397078428² (a number of 23 digits) 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105689050 + ... + 105689857.

It is an arithmetic number, because the mean of its divisors is an integer number (12577045026).

Almost surely, 2^85397078428 is an apocalyptic number.

It is an amenable number.

85397078428 is a deficient number, since it is larger than the sum of its proper divisors (65527461884).

85397078428 is a wasteful number, since it uses less digits than its factorization.

85397078428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211379012 (or 211379010 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 85397078428 in words is "eighty-five billion, three hundred ninety-seven million, seventy-eight thousand, four hundred twenty-eight".