158865840 has 480 divisors, whose sum is σ = 678528000. Its totient is φ = 33965568.

The previous prime is 158865823. The next prime is 158865841. The reversal of 158865840 is 48568851.

158865840 is a `hidden beast` number, since 1 + 588 + 65 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (158865841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2010921 + ... + 2010999.

It is an arithmetic number, because the mean of its divisors is an integer number (1413600).

Almost surely, 2^158865840 is an apocalyptic number.

158865840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158865840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339264000).

158865840 is an abundant number, since it is smaller than the sum of its proper divisors (519662160).

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

158865840 is a wasteful number, since it uses less digits than its factorization.

158865840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The square root of 158865840 is about 12604.1993002332. The cubic root of 158865840 is about 541.5977371328.

The spelling of 158865840 in words is "one hundred fifty-eight million, eight hundred sixty-five thousand, eight hundred forty".