158518440 has 48 divisors (see below), whose sum is σ = 515186100. Its totient is φ = 42271488.

The previous prime is 158518439. The next prime is 158518447. The reversal of 158518440 is 44815851.

It can be written as a sum of positive squares in 2 ways, for example, as 150258564 + 8259876 = 12258^2 + 2874^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 158518395 and 158518404.

It is not an unprimeable number, because it can be changed into a prime (158518447) 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 11 ways as a sum of consecutive naturals, for example, 219805 + ... + 220524.

Almost surely, 2^158518440 is an apocalyptic number.

158518440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158518440 is an abundant number, since it is smaller than the sum of its proper divisors (356667660).

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

158518440 is a wasteful number, since it uses less digits than its factorization.

158518440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440346 (or 440339 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 158518440 is about 12590.4106366711. The cubic root of 158518440 is about 541.2026692625.

The spelling of 158518440 in words is "one hundred fifty-eight million, five hundred eighteen thousand, four hundred forty".