158297990 has 8 divisors (see below), whose sum is σ = 284936400. Its totient is φ = 63319192.

The previous prime is 158297969. The next prime is 158298053. The reversal of 158297990 is 99792851.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7914890 + ... + 7914909.

It is an arithmetic number, because the mean of its divisors is an integer number (35617050).

Almost surely, 2^158297990 is an apocalyptic number.

158297990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158297990 is a deficient number, since it is larger than the sum of its proper divisors (126638410).

158297990 is a wasteful number, since it uses less digits than its factorization.

158297990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15829806.

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 158297990 is about 12581.6529120780. The cubic root of 158297990 is about 540.9516711702.

The spelling of 158297990 in words is "one hundred fifty-eight million, two hundred ninety-seven thousand, nine hundred ninety".