158728770 has 48 divisors (see below), whose sum is σ = 415876032. Its totient is φ = 42001440.

The previous prime is 158728747. The next prime is 158728777. The reversal of 158728770 is 77827851.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (158728777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5059 + ... + 18521.

It is an arithmetic number, because the mean of its divisors is an integer number (8664084).

Almost surely, 2^158728770 is an apocalyptic number.

158728770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 158728770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207938016).

158728770 is an abundant number, since it is smaller than the sum of its proper divisors (257147262).

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

158728770 is a wasteful number, since it uses less digits than its factorization.

158728770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13607 (or 13604 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 45.

The square root of 158728770 is about 12598.7606533341. The cubic root of 158728770 is about 541.4419281755.

It can be divided in two parts, 15872 and 8770, that added together give a palindrome (24642).

The spelling of 158728770 in words is "one hundred fifty-eight million, seven hundred twenty-eight thousand, seven hundred seventy".