158645394 has 36 divisors (see below), whose sum is σ = 365152554. Its totient is φ = 49769472.

The previous prime is 158645393. The next prime is 158645401. The reversal of 158645394 is 493546851.

158645394 is a `hidden beast` number, since 1 + 58 + 64 + 539 + 4 = 666.

158645394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 158382225 + 263169 = 12585^2 + 513^2 .

It is a super-2 number, since 2×158645394² = 50336722074830472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158645393) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10047 + ... + 20450.

Almost surely, 2^158645394 is an apocalyptic number.

158645394 is an abundant number, since it is smaller than the sum of its proper divisors (206507160).

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

158645394 is a wasteful number, since it uses less digits than its factorization.

158645394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30539 (or 30519 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 158645394 is about 12595.4513218066. The cubic root of 158645394 is about 541.3471098916.

The spelling of 158645394 in words is "one hundred fifty-eight million, six hundred forty-five thousand, three hundred ninety-four".