85508378 has 4 divisors (see below), whose sum is σ = 128262570. Its totient is φ = 42754188.

The previous prime is 85508347. The next prime is 85508387. The reversal of 85508378 is 87380558.

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

It can be written as a sum of positive squares in only one way, i.e., 85507009 + 1369 = 9247^2 + 37^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21377093 + ... + 21377096.

Almost surely, 2^85508378 is an apocalyptic number.

85508378 is a deficient number, since it is larger than the sum of its proper divisors (42754192).

85508378 is a wasteful number, since it uses less digits than its factorization.

85508378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42754191.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 85508378 is about 9247.0740237115. The cubic root of 85508378 is about 440.5577946426.

The spelling of 85508378 in words is "eighty-five million, five hundred eight thousand, three hundred seventy-eight".