1238170985 has 16 divisors (see below), whose sum is σ = 1511903232. Its totient is φ = 973176000.

The previous prime is 1238170951. The next prime is 1238170987. The reversal of 1238170985 is 5890718321.

It is not a de Polignac number, because 1238170985 - 2⁸ = 1238170729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1238170987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349292 + ... + 352818.

It is an arithmetic number, because the mean of its divisors is an integer number (94493952).

Almost surely, 2^1238170985 is an apocalyptic number.

It is an amenable number.

1238170985 is a deficient number, since it is larger than the sum of its proper divisors (273732247).

1238170985 is a wasteful number, since it uses less digits than its factorization.

1238170985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 1238170985 is about 35187.6538717772. The cubic root of 1238170985 is about 1073.8085910070.

The spelling of 1238170985 in words is "one billion, two hundred thirty-eight million, one hundred seventy thousand, nine hundred eighty-five".