85781010 has 64 divisors (see below), whose sum is σ = 247680000. Its totient is φ = 18574272.

The previous prime is 85780957. The next prime is 85781021. The reversal of 85781010 is 1018758.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6760 + ... + 14739.

It is an arithmetic number, because the mean of its divisors is an integer number (3870000).

Almost surely, 2^85781010 is an apocalyptic number.

85781010 is an abundant number, since it is smaller than the sum of its proper divisors (161898990).

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

85781010 is a wasteful number, since it uses less digits than its factorization.

85781010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21535.

The product of its (nonzero) digits is 2240, while the sum is 30.

The square root of 85781010 is about 9261.8038199910. The cubic root of 85781010 is about 441.0255177258.

Adding to 85781010 its reverse (1018758), we get a palindrome (86799768).

The spelling of 85781010 in words is "eighty-five million, seven hundred eighty-one thousand, ten".