85513828 has 6 divisors (see below), whose sum is σ = 149649206. Its totient is φ = 42756912.

The previous prime is 85513819. The next prime is 85513829. The reversal of 85513828 is 82831558.

It can be written as a sum of positive squares in only one way, i.e., 83576164 + 1937664 = 9142^2 + 1392^2 .

It is a super-2 number, since 2×85513828² = 14625229558427168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85513829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10689225 + ... + 10689232.

Almost surely, 2^85513828 is an apocalyptic number.

It is an amenable number.

85513828 is a deficient number, since it is larger than the sum of its proper divisors (64135378).

85513828 is a wasteful number, since it uses less digits than its factorization.

85513828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21378461 (or 21378459 counting only the distinct ones).

The product of its digits is 76800, while the sum is 40.

The square root of 85513828 is about 9247.3687068268. The cubic root of 85513828 is about 440.5671543063.

The spelling of 85513828 in words is "eighty-five million, five hundred thirteen thousand, eight hundred twenty-eight".