158005840 has 20 divisors (see below), whose sum is σ = 367363764. Its totient is φ = 63202304.

The previous prime is 158005831. The next prime is 158005867. The reversal of 158005840 is 48500851.

158005840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 65999376 + 92006464 = 8124^2 + 9592^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987457 + ... + 987616.

Almost surely, 2^158005840 is an apocalyptic number.

158005840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158005840 is an abundant number, since it is smaller than the sum of its proper divisors (209357924).

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

158005840 is a wasteful number, since it uses less digits than its factorization.

158005840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975086 (or 1975080 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 158005840 is about 12570.0373905570. The cubic root of 158005840 is about 540.6186781980.

The spelling of 158005840 in words is "one hundred fifty-eight million, five thousand, eight hundred forty".