158240040 has 128 divisors (see below), whose sum is σ = 545391360. Its totient is φ = 35979264.

The previous prime is 158240021. The next prime is 158240041. The reversal of 158240040 is 40042851.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (158240041) 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 31 ways as a sum of consecutive naturals, for example, 215514 + ... + 216246.

It is an arithmetic number, because the mean of its divisors is an integer number (4260870).

Almost surely, 2^158240040 is an apocalyptic number.

158240040 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 158240040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272695680).

158240040 is an abundant number, since it is smaller than the sum of its proper divisors (387151320).

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

158240040 is a wasteful number, since it uses less digits than its factorization.

158240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 158240040 is about 12579.3497447205. The cubic root of 158240040 is about 540.8856522746.

Adding to 158240040 its reverse (40042851), we get a palindrome (198282891).

The spelling of 158240040 in words is "one hundred fifty-eight million, two hundred forty thousand, forty".