938742861 has 32 divisors (see below), whose sum is σ = 1571235840. Its totient is φ = 486091584.

The previous prime is 938742851. The next prime is 938742869. The reversal of 938742861 is 168247839.

It is not a de Polignac number, because 938742861 - 2⁷ = 938742733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 938742861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938742869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41970 + ... + 60323.

It is an arithmetic number, because the mean of its divisors is an integer number (49101120).

Almost surely, 2^938742861 is an apocalyptic number.

It is an amenable number.

938742861 is a deficient number, since it is larger than the sum of its proper divisors (632492979).

938742861 is a wasteful number, since it uses less digits than its factorization.

938742861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102345.

The product of its digits is 580608, while the sum is 48.

The square root of 938742861 is about 30638.9108977457. The cubic root of 938742861 is about 979.1492203135.

The spelling of 938742861 in words is "nine hundred thirty-eight million, seven hundred forty-two thousand, eight hundred sixty-one".