158728340 has 24 divisors (see below), whose sum is σ = 334637352. Its totient is φ = 63242240.

The previous prime is 158728321. The next prime is 158728357. The reversal of 158728340 is 43827851.

It can be written as a sum of positive squares in 4 ways, for example, as 105555076 + 53173264 = 10274^2 + 7292^2 .

It is a junction number, because it is equal to n+sod(n) for n = 158728294 and 158728303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10301 + ... + 20580.

It is an arithmetic number, because the mean of its divisors is an integer number (13943223).

Almost surely, 2^158728340 is an apocalyptic number.

158728340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158728340 is an abundant number, since it is smaller than the sum of its proper divisors (175909012).

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

158728340 is a wasteful number, since it uses less digits than its factorization.

158728340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31147 (or 31145 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 158728340 is about 12598.7435881520. The cubic root of 158728340 is about 541.4414392487.

The spelling of 158728340 in words is "one hundred fifty-eight million, seven hundred twenty-eight thousand, three hundred forty".