134219778 has 64 divisors (see below), whose sum is σ = 336033792. Its totient is φ = 34721280.

The previous prime is 134219759. The next prime is 134219807. The reversal of 134219778 is 877912431.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162675 + ... + 163497.

It is an arithmetic number, because the mean of its divisors is an integer number (5250528).

Almost surely, 2^134219778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134219778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168016896).

134219778 is an abundant number, since it is smaller than the sum of its proper divisors (201814014).

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

134219778 is a wasteful number, since it uses less digits than its factorization.

134219778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199.

The product of its digits is 84672, while the sum is 42.

The square root of 134219778 is about 11585.3259772870. The cubic root of 134219778 is about 512.0026066965.

It can be divided in two parts, 134 and 219778, that added together give a palindrome (219912).

The spelling of 134219778 in words is "one hundred thirty-four million, two hundred nineteen thousand, seven hundred seventy-eight".