158499940 has 24 divisors (see below), whose sum is σ = 336285432. Its totient is φ = 62745600.

The previous prime is 158499889. The next prime is 158499941. The reversal of 158499940 is 49994851.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 142884 + 158357056 = 378^2 + 12584^2 .

It is not an unprimeable number, because it can be changed into a prime (158499941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38911 + ... + 42790.

It is an arithmetic number, because the mean of its divisors is an integer number (14011893).

Almost surely, 2^158499940 is an apocalyptic number.

158499940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158499940 is an abundant number, since it is smaller than the sum of its proper divisors (177785492).

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

158499940 is a wasteful number, since it uses less digits than its factorization.

158499940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81807 (or 81805 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 158499940 is about 12589.6759291095. The cubic root of 158499940 is about 541.1816146375.

The spelling of 158499940 in words is "one hundred fifty-eight million, four hundred ninety-nine thousand, nine hundred forty".