134623728 has 80 divisors (see below), whose sum is σ = 388144800. Its totient is φ = 44674560.

The previous prime is 134623673. The next prime is 134623733. The reversal of 134623728 is 827326431.

It is a happy number.

134623728 is a `hidden beast` number, since 1 + 3 + 4 + 623 + 7 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 134623692 and 134623701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120838 + ... + 121946.

It is an arithmetic number, because the mean of its divisors is an integer number (4851810).

Almost surely, 2^134623728 is an apocalyptic number.

134623728 is a gapful number since it is divisible by the number (18) 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 134623728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194072400).

134623728 is an abundant number, since it is smaller than the sum of its proper divisors (253521072).

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

134623728 is a wasteful number, since it uses less digits than its factorization.

134623728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407 (or 1395 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 134623728 is about 11602.7465713942. The cubic root of 134623728 is about 512.5157360229.

The spelling of 134623728 in words is "one hundred thirty-four million, six hundred twenty-three thousand, seven hundred twenty-eight".