158507640 has 96 divisors (see below), whose sum is σ = 527763600. Its totient is φ = 41233920.

The previous prime is 158507639. The next prime is 158507669. The reversal of 158507640 is 46705851.

158507640 is a `hidden beast` number, since 1 + 5 + 8 + 5 + 0 + 7 + 640 = 666.

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 = 158507595 and 158507604.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9391 + ... + 20129.

Almost surely, 2^158507640 is an apocalyptic number.

158507640 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 158507640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263881800).

158507640 is an abundant number, since it is smaller than the sum of its proper divisors (369255960).

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

158507640 is a wasteful number, since it uses less digits than its factorization.

158507640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10797 (or 10790 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 158507640 is about 12589.9817315197. The cubic root of 158507640 is about 541.1903781129.

The spelling of 158507640 in words is "one hundred fifty-eight million, five hundred seven thousand, six hundred forty".