158428813 has 4 divisors (see below), whose sum is σ = 162113248. Its totient is φ = 154744380.

The previous prime is 158428799. The next prime is 158428843. The reversal of 158428813 is 318824851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158428813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158428843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1842153 + ... + 1842238.

It is an arithmetic number, because the mean of its divisors is an integer number (40528312).

Almost surely, 2^158428813 is an apocalyptic number.

It is an amenable number.

158428813 is a deficient number, since it is larger than the sum of its proper divisors (3684435).

158428813 is an equidigital number, since it uses as much as digits as its factorization.

158428813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3684434.

The product of its digits is 61440, while the sum is 40.

The square root of 158428813 is about 12586.8507975585. The cubic root of 158428813 is about 541.1006506027.

The spelling of 158428813 in words is "one hundred fifty-eight million, four hundred twenty-eight thousand, eight hundred thirteen".