158512820 has 48 divisors (see below), whose sum is σ = 353035200. Its totient is φ = 59616000.

The previous prime is 158512787. The next prime is 158512829. The reversal of 158512820 is 28215851.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158512829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51320 + ... + 54320.

It is an arithmetic number, because the mean of its divisors is an integer number (7354900).

Almost surely, 2^158512820 is an apocalyptic number.

158512820 is a gapful number since it is divisible by the number (10) 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 158512820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176517600).

158512820 is an abundant number, since it is smaller than the sum of its proper divisors (194522380).

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

158512820 is a wasteful number, since it uses less digits than its factorization.

158512820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168 (or 3166 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 158512820 is about 12590.1874489620. The cubic root of 158512820 is about 541.1962733821.

The spelling of 158512820 in words is "one hundred fifty-eight million, five hundred twelve thousand, eight hundred twenty".