85381838 has 4 divisors (see below), whose sum is σ = 128072760. Its totient is φ = 42690918.

The previous prime is 85381823. The next prime is 85381847. The reversal of 85381838 is 83818358.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21345458 + ... + 21345461.

It is an arithmetic number, because the mean of its divisors is an integer number (32018190).

Almost surely, 2^85381838 is an apocalyptic number.

85381838 is a deficient number, since it is larger than the sum of its proper divisors (42690922).

85381838 is a wasteful number, since it uses less digits than its factorization.

85381838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42690921.

The product of its digits is 184320, while the sum is 44.

The square root of 85381838 is about 9240.2293261585. The cubic root of 85381838 is about 440.3403668029.

The spelling of 85381838 in words is "eighty-five million, three hundred eighty-one thousand, eight hundred thirty-eight".