85815950 has 48 divisors (see below), whose sum is σ = 178876944. Its totient is φ = 30355200.

The previous prime is 85815943. The next prime is 85815973. The reversal of 85815950 is 5951858.

It is a junction number, because it is equal to n+sod(n) for n = 85815898 and 85815907.

It is a congruent number.

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, 18242 + ... + 22458.

It is an arithmetic number, because the mean of its divisors is an integer number (3726603).

Almost surely, 2^85815950 is an apocalyptic number.

85815950 is an abundant number, since it is smaller than the sum of its proper divisors (93060994).

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

85815950 is a wasteful number, since it uses less digits than its factorization.

85815950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277 (or 4272 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 85815950 is about 9263.6898695930. The cubic root of 85815950 is about 441.0853885523.

The spelling of 85815950 in words is "eighty-five million, eight hundred fifteen thousand, nine hundred fifty".