156990238 has 8 divisors (see below), whose sum is σ = 235617480. Its totient is φ = 78451080.

The previous prime is 156990191. The next prime is 156990241. The reversal of 156990238 is 832099651.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 156990194 and 156990203.

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, 17368 + ... + 24811.

It is an arithmetic number, because the mean of its divisors is an integer number (29452185).

Almost surely, 2^156990238 is an apocalyptic number.

156990238 is a deficient number, since it is larger than the sum of its proper divisors (78627242).

156990238 is a wasteful number, since it uses less digits than its factorization.

156990238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44042.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 156990238 is about 12529.5745338778. The cubic root of 156990238 is about 539.4578898814.

The spelling of 156990238 in words is "one hundred fifty-six million, nine hundred ninety thousand, two hundred thirty-eight".