921908038 has 12 divisors (see below), whose sum is σ = 1400607180. Its totient is φ = 455112996.

The previous prime is 921908033. The next prime is 921908047. The reversal of 921908038 is 830809129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921908033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24448 + ... + 49411.

It is an arithmetic number, because the mean of its divisors is an integer number (116717265).

Almost surely, 2^921908038 is an apocalyptic number.

921908038 is a deficient number, since it is larger than the sum of its proper divisors (478699142).

921908038 is an equidigital number, since it uses as much as digits as its factorization.

921908038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74019 (or 73940 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 921908038 is about 30362.9385600274. The cubic root of 921908038 is about 973.2607302082.

The spelling of 921908038 in words is "nine hundred twenty-one million, nine hundred eight thousand, thirty-eight".