158321840 has 40 divisors (see below), whose sum is σ = 374144208. Its totient is φ = 62288640.

The previous prime is 158321819. The next prime is 158321879. The reversal of 158321840 is 48123851.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 158321797 and 158321806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11342 + ... + 21101.

Almost surely, 2^158321840 is an apocalyptic number.

158321840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158321840 is an abundant number, since it is smaller than the sum of its proper divisors (215822368).

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

158321840 is a wasteful number, since it uses less digits than its factorization.

158321840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32517 (or 32511 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 158321840 is about 12582.6006850730. The cubic root of 158321840 is about 540.9788373384.

The spelling of 158321840 in words is "one hundred fifty-eight million, three hundred twenty-one thousand, eight hundred forty".