158018436 has 18 divisors (see below), whose sum is σ = 399435582. Its totient is φ = 52672800.

The previous prime is 158018431. The next prime is 158018467. The reversal of 158018436 is 634810851.

It can be written as a sum of positive squares in only one way, i.e., 155750400 + 2268036 = 12480^2 + 1506^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×158018436² = 49939652231772192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4389401 = 158018436 / (1 + 5 + 8 + 0 + 1 + 8 + 4 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 158018436.

It is not an unprimeable number, because it can be changed into a prime (158018431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2194665 + ... + 2194736.

Almost surely, 2^158018436 is an apocalyptic number.

It is an amenable number.

158018436 is an abundant number, since it is smaller than the sum of its proper divisors (241417146).

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

158018436 is a wasteful number, since it uses less digits than its factorization.

158018436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389411 (or 4389406 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 158018436 is about 12570.5384132900. The cubic root of 158018436 is about 540.6330435993.

The spelling of 158018436 in words is "one hundred fifty-eight million, eighteen thousand, four hundred thirty-six".