801561938 has 8 divisors (see below), whose sum is σ = 1209293388. Its totient is φ = 398464144.

The previous prime is 801561913. The next prime is 801561941. The reversal of 801561938 is 839165108.

It can be written as a sum of positive squares in 2 ways, for example, as 527758729 + 273803209 = 22973^2 + 16547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 801561895 and 801561904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157981 + ... + 1158672.

Almost surely, 2^801561938 is an apocalyptic number.

801561938 is a deficient number, since it is larger than the sum of its proper divisors (407731450).

801561938 is a wasteful number, since it uses less digits than its factorization.

801561938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316828.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 801561938 is about 28311.8692071011. The cubic root of 801561938 is about 928.9215301241.

The spelling of 801561938 in words is "eight hundred one million, five hundred sixty-one thousand, nine hundred thirty-eight".