158238765 has 40 divisors (see below), whose sum is σ = 287705088. Its totient is φ = 83190240.

The previous prime is 158238727. The next prime is 158238779. The reversal of 158238765 is 567832851.

158238765 is a `hidden beast` number, since 1 + 582 + 3 + 8 + 7 + 65 = 666.

It is not a de Polignac number, because 158238765 - 2⁷ = 158238637 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 158238765.

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 39 ways as a sum of consecutive naturals, for example, 26004 + ... + 31506.

Almost surely, 2^158238765 is an apocalyptic number.

158238765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158238765 is a deficient number, since it is larger than the sum of its proper divisors (129466323).

158238765 is an equidigital number, since it uses as much as digits as its factorization.

158238765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5591 (or 5582 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 158238765 is about 12579.2990663232. The cubic root of 158238765 is about 540.8841995637.

The spelling of 158238765 in words is "one hundred fifty-eight million, two hundred thirty-eight thousand, seven hundred sixty-five".