85178738 has 16 divisors (see below), whose sum is σ = 137839320. Its totient is φ = 39326976.

The previous prime is 85178719. The next prime is 85178777. The reversal of 85178738 is 83787158.

It can be written as a sum of positive squares in 4 ways, for example, as 67848169 + 17330569 = 8237^2 + 4163^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85178692 and 85178701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21833 + ... + 25436.

Almost surely, 2^85178738 is an apocalyptic number.

85178738 is a deficient number, since it is larger than the sum of its proper divisors (52660582).

85178738 is a wasteful number, since it uses less digits than its factorization.

85178738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47341.

The product of its digits is 376320, while the sum is 47.

The square root of 85178738 is about 9229.2327958504. The cubic root of 85178738 is about 439.9909398961.

The spelling of 85178738 in words is "eighty-five million, one hundred seventy-eight thousand, seven hundred thirty-eight".