158278778 has 64 divisors (see below), whose sum is σ = 305786880. Its totient is φ = 59875200.

The previous prime is 158278763. The next prime is 158278807. The reversal of 158278778 is 877872851.

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, 250523 + ... + 251153.

It is an arithmetic number, because the mean of its divisors is an integer number (4777920).

Almost surely, 2^158278778 is an apocalyptic number.

158278778 is a deficient number, since it is larger than the sum of its proper divisors (147508102).

158278778 is a wasteful number, since it uses less digits than its factorization.

158278778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723.

The product of its digits is 1756160, while the sum is 53.

The square root of 158278778 is about 12580.8893962231. The cubic root of 158278778 is about 540.9297858976.

The spelling of 158278778 in words is "one hundred fifty-eight million, two hundred seventy-eight thousand, seven hundred seventy-eight".