157985798 has 12 divisors (see below), whose sum is σ = 249573660. Its totient is φ = 74798676.

The previous prime is 157985783. The next prime is 157985801. The reversal of 157985798 is 897589751.

157985798 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76463 + ... + 78501.

It is an arithmetic number, because the mean of its divisors is an integer number (20797805).

Almost surely, 2^157985798 is an apocalyptic number.

157985798 is a deficient number, since it is larger than the sum of its proper divisors (91587862).

157985798 is an frugal number, since it uses more digits than its factorization.

157985798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4099 (or 2060 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 59.

The square root of 157985798 is about 12569.2401520537. The cubic root of 157985798 is about 540.5958192587.

The spelling of 157985798 in words is "one hundred fifty-seven million, nine hundred eighty-five thousand, seven hundred ninety-eight".