158691402 has 48 divisors (see below), whose sum is σ = 355871880. Its totient is φ = 51072000.

The previous prime is 158691397. The next prime is 158691427. The reversal of 158691402 is 204196851.

It can be written as a sum of positive squares in 4 ways, for example, as 120758121 + 37933281 = 10989^2 + 6159^2 .

It is a super-2 number, since 2×158691402² = 50365922137451208, which contains 22 as substring.

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, 73474 + ... + 75602.

Almost surely, 2^158691402 is an apocalyptic number.

158691402 is an abundant number, since it is smaller than the sum of its proper divisors (197180478).

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

158691402 is a wasteful number, since it uses less digits than its factorization.

158691402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279 (or 2276 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 158691402 is about 12597.2775630292. The cubic root of 158691402 is about 541.3994360049.

It can be divided in two parts, 15869 and 1402, that added together give a palindrome (17271).

The spelling of 158691402 in words is "one hundred fifty-eight million, six hundred ninety-one thousand, four hundred two".