157936506 has 144 divisors (see below), whose sum is σ = 418394592. Its totient is φ = 39372480.

The previous prime is 157936489. The next prime is 157936517. The reversal of 157936506 is 605639751.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon 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 71 ways as a sum of consecutive naturals, for example, 3672921 + ... + 3672963.

It is an arithmetic number, because the mean of its divisors is an integer number (2905518).

Almost surely, 2^157936506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157936506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209197296).

157936506 is an abundant number, since it is smaller than the sum of its proper divisors (260458086).

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

157936506 is a wasteful number, since it uses less digits than its factorization.

157936506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 157936506 is about 12567.2791804750. The cubic root of 157936506 is about 540.5395909537.

The spelling of 157936506 in words is "one hundred fifty-seven million, nine hundred thirty-six thousand, five hundred six".