158265840 has 80 divisors (see below), whose sum is σ = 495289728. Its totient is φ = 41803008.

The previous prime is 158265827. The next prime is 158265851. The reversal of 158265840 is 48562851.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×158265840² = 50096152221811200, which contains 22 as substring.

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, 22599 + ... + 28761.

Almost surely, 2^158265840 is an apocalyptic number.

158265840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158265840 is the 10272-nd pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158265840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247644864).

158265840 is an abundant number, since it is smaller than the sum of its proper divisors (337023888).

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

158265840 is a wasteful number, since it uses less digits than its factorization.

158265840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6286 (or 6280 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 158265840 is about 12580.3751931332. The cubic root of 158265840 is about 540.9150466290.

The spelling of 158265840 in words is "one hundred fifty-eight million, two hundred sixty-five thousand, eight hundred forty".