85245590 has 32 divisors (see below), whose sum is σ = 168549120. Its totient is φ = 30897504.

The previous prime is 85245557. The next prime is 85245593. The reversal of 85245590 is 9554258.

It is a super-2 number, since 2×85245590² = 14533621228896200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85245593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5384 + ... + 14123.

It is an arithmetic number, because the mean of its divisors is an integer number (5267160).

Almost surely, 2^85245590 is an apocalyptic number.

85245590 is a deficient number, since it is larger than the sum of its proper divisors (83303530).

85245590 is a wasteful number, since it uses less digits than its factorization.

85245590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19556.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 85245590 is about 9232.8538383319. The cubic root of 85245590 is about 440.1060178414.

The spelling of 85245590 in words is "eighty-five million, two hundred forty-five thousand, five hundred ninety".