85997428 has 12 divisors (see below), whose sum is σ = 164176992. Its totient is φ = 39089720.

The previous prime is 85997423. The next prime is 85997447. The reversal of 85997428 is 82479958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85997423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977200 + ... + 977287.

It is an arithmetic number, because the mean of its divisors is an integer number (13681416).

Almost surely, 2^85997428 is an apocalyptic number.

It is an amenable number.

85997428 is a deficient number, since it is larger than the sum of its proper divisors (78179564).

85997428 is a wasteful number, since it uses less digits than its factorization.

85997428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954502 (or 1954500 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 52.

The square root of 85997428 is about 9273.4798215125. The cubic root of 85997428 is about 441.3960958822.

The spelling of 85997428 in words is "eighty-five million, nine hundred ninety-seven thousand, four hundred twenty-eight".