158269440 has 272 divisors, whose sum is σ = 603975168. Its totient is φ = 34603008.

The previous prime is 158269429. The next prime is 158269459. The reversal of 158269440 is 44962851.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6881269 + ... + 6881291.

Almost surely, 2^158269440 is an apocalyptic number.

158269440 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 158269440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301987584).

158269440 is an abundant number, since it is smaller than the sum of its proper divisors (445705728).

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

158269440 is an frugal number, since it uses more digits than its factorization.

158269440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 158269440 is about 12580.5182723129. The cubic root of 158269440 is about 540.9191479129.

The spelling of 158269440 in words is "one hundred fifty-eight million, two hundred sixty-nine thousand, four hundred forty".