85273540 has 72 divisors (see below), whose sum is σ = 198950976. Its totient is φ = 30676800.

The previous prime is 85273523. The next prime is 85273583. The reversal of 85273540 is 4537258.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 85273496 and 85273505.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404035 + ... + 404245.

It is an arithmetic number, because the mean of its divisors is an integer number (2763208).

Almost surely, 2^85273540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85273540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99475488).

85273540 is an abundant number, since it is smaller than the sum of its proper divisors (113677436).

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

85273540 is a wasteful number, since it uses less digits than its factorization.

85273540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 85273540 is about 9234.3673307921. The cubic root of 85273540 is about 440.1541126815.

The spelling of 85273540 in words is "eighty-five million, two hundred seventy-three thousand, five hundred forty".