938121642 has 32 divisors (see below), whose sum is σ = 2207347200. Its totient is φ = 294312384.

The previous prime is 938121619. The next prime is 938121647. The reversal of 938121642 is 246121839.

938121642 is a `hidden beast` number, since 9 + 3 + 8 + 1 + 2 + 1 + 642 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 938121597 and 938121606.

It is not an unprimeable number, because it can be changed into a prime (938121647) 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, 510042 + ... + 511877.

It is an arithmetic number, because the mean of its divisors is an integer number (68979600).

Almost surely, 2^938121642 is an apocalyptic number.

938121642 is an abundant number, since it is smaller than the sum of its proper divisors (1269225558).

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

938121642 is a wasteful number, since it uses less digits than its factorization.

938121642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021947 (or 1021941 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 938121642 is about 30628.7714738936. The cubic root of 938121642 is about 978.9331865983.

The spelling of 938121642 in words is "nine hundred thirty-eight million, one hundred twenty-one thousand, six hundred forty-two".