158011990 has 8 divisors (see below), whose sum is σ = 284421600. Its totient is φ = 63204792.

The previous prime is 158011969. The next prime is 158011993. The reversal of 158011990 is 99110851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158011993) by changing a digit.

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, 7900590 + ... + 7900609.

It is an arithmetic number, because the mean of its divisors is an integer number (35552700).

Almost surely, 2^158011990 is an apocalyptic number.

158011990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158011990 is a deficient number, since it is larger than the sum of its proper divisors (126409610).

158011990 is a wasteful number, since it uses less digits than its factorization.

158011990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15801206.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 158011990 is about 12570.2820175205. The cubic root of 158011990 is about 540.6256922040.

The spelling of 158011990 in words is "one hundred fifty-eight million, eleven thousand, nine hundred ninety".