134778620 has 36 divisors (see below), whose sum is σ = 295899240. Its totient is φ = 51563424.

The previous prime is 134778613. The next prime is 134778649. The reversal of 134778620 is 26877431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4211 + ... + 16949.

Almost surely, 2^134778620 is an apocalyptic number.

134778620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134778620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147949620).

134778620 is an abundant number, since it is smaller than the sum of its proper divisors (161120620).

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

134778620 is a wasteful number, since it uses less digits than its factorization.

134778620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794 (or 12769 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 134778620 is about 11609.4194514627. The cubic root of 134778620 is about 512.7122198636.

The spelling of 134778620 in words is "one hundred thirty-four million, seven hundred seventy-eight thousand, six hundred twenty".