158320728 has 48 divisors (see below), whose sum is σ = 454011480. Its totient is φ = 49668864.

The previous prime is 158320717. The next prime is 158320733. The reversal of 158320728 is 827023851.

158320728 is a `hidden beast` number, since 1 + 583 + 2 + 0 + 72 + 8 = 666.

158320728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 158320692 and 158320701.

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, 63450 + ... + 65897.

Almost surely, 2^158320728 is an apocalyptic number.

158320728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

158320728 is an abundant number, since it is smaller than the sum of its proper divisors (295690752).

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

158320728 is a wasteful number, since it uses less digits than its factorization.

158320728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129376 (or 129369 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 158320728 is about 12582.5564969922. The cubic root of 158320728 is about 540.9775707836.

The spelling of 158320728 in words is "one hundred fifty-eight million, three hundred twenty thousand, seven hundred twenty-eight".