158779840 has 28 divisors (see below), whose sum is σ = 378095256. Its totient is φ = 63511808.

The previous prime is 158779837. The next prime is 158779853. The reversal of 158779840 is 48977851.

It is a super-2 number, since 2×158779840² = 50422075180851200, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 247774 + ... + 248413.

It is an arithmetic number, because the mean of its divisors is an integer number (13503402).

Almost surely, 2^158779840 is an apocalyptic number.

158779840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158779840 is an abundant number, since it is smaller than the sum of its proper divisors (219315416).

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

158779840 is an equidigital number, since it uses as much as digits as its factorization.

158779840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496204 (or 496194 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 158779840 is about 12600.7872769919. The cubic root of 158779840 is about 541.4999904793.

The spelling of 158779840 in words is "one hundred fifty-eight million, seven hundred seventy-nine thousand, eight hundred forty".