158685930 has 72 divisors (see below), whose sum is σ = 446804748. Its totient is φ = 39057408.

The previous prime is 158685913. The next prime is 158685971. The reversal of 158685930 is 39586851.

158685930 is a `hidden beast` number, since 1 + 58 + 6 + 8 + 593 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 23824161 + 134861769 = 4881^2 + 11613^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9994 + ... + 20426.

Almost surely, 2^158685930 is an apocalyptic number.

158685930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 158685930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223402374).

158685930 is an abundant number, since it is smaller than the sum of its proper divisors (288118818).

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

158685930 is a wasteful number, since it uses less digits than its factorization.

158685930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10472 (or 10456 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 158685930 is about 12597.0603713724. The cubic root of 158685930 is about 541.3932130848.

The spelling of 158685930 in words is "one hundred fifty-eight million, six hundred eighty-five thousand, nine hundred thirty".