371138985 has 72 divisors (see below), whose sum is σ = 792437256. Its totient is φ = 159667200.

The previous prime is 371138983. The next prime is 371138987. The reversal of 371138985 is 589831173.

It is an interprime number because it is at equal distance from previous prime (371138983) and next prime (371138987).

It can be written as a sum of positive squares in 4 ways, for example, as 176703849 + 194435136 = 13293^2 + 13944^2 .

It is not a de Polignac number, because 371138985 - 2¹ = 371138983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 371138985.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (371138983) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 32535 + ... + 42435.

It is an arithmetic number, because the mean of its divisors is an integer number (11006073).

Almost surely, 2^371138985 is an apocalyptic number.

371138985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

371138985 is an abundant number, since it is smaller than the sum of its proper divisors (421298271).

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

371138985 is a wasteful number, since it uses less digits than its factorization.

371138985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9943 (or 9933 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 371138985 is about 19264.9678172584. The cubic root of 371138985 is about 718.6413324309.

The spelling of 371138985 in words is "three hundred seventy-one million, one hundred thirty-eight thousand, nine hundred eighty-five".