158977728 has 280 divisors, whose sum is σ = 581733152. Its totient is φ = 41803776.

The previous prime is 158977691. The next prime is 158977747. The reversal of 158977728 is 827779851.

It is a happy number.

158977728 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 (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 471576 + ... + 471912.

Almost surely, 2^158977728 is an apocalyptic number.

158977728 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 158977728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290866576).

158977728 is an abundant number, since it is smaller than the sum of its proper divisors (422755424).

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

158977728 is a wasteful number, since it uses less digits than its factorization.

158977728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 362 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 54.

The square root of 158977728 is about 12608.6370397438. The cubic root of 158977728 is about 541.7248550139.

The spelling of 158977728 in words is "one hundred fifty-eight million, nine hundred seventy-seven thousand, seven hundred twenty-eight".