158072538 has 32 divisors (see below), whose sum is σ = 342744192. Its totient is φ = 48312000.

The previous prime is 158072531. The next prime is 158072539. The reversal of 158072538 is 835270851.

It is a super-2 number, since 2×158072538² = 49973854539522888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 158072496 and 158072505.

It is not an unprimeable number, because it can be changed into a prime (158072531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5068 + ... + 18488.

It is an arithmetic number, because the mean of its divisors is an integer number (10710756).

Almost surely, 2^158072538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158072538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171372096).

158072538 is an abundant number, since it is smaller than the sum of its proper divisors (184671654).

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

158072538 is a wasteful number, since it uses less digits than its factorization.

158072538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13590.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 158072538 is about 12572.6901655930. The cubic root of 158072538 is about 540.6947368047.

The spelling of 158072538 in words is "one hundred fifty-eight million, seventy-two thousand, five hundred thirty-eight".