3121633404 has 84 divisors (see below), whose sum is σ = 8365174944. Its totient is φ = 1018360512.

The previous prime is 3121633397. The next prime is 3121633469. The reversal of 3121633404 is 4043361213.

3121633404 is a `hidden beast` number, since 3 + 1 + 21 + 633 + 4 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 125664 + ... + 148440.

It is an arithmetic number, because the mean of its divisors is an integer number (99585416).

Almost surely, 2^3121633404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121633404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4182587472).

3121633404 is an abundant number, since it is smaller than the sum of its proper divisors (5243541540).

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

3121633404 is a wasteful number, since it uses less digits than its factorization.

3121633404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22846 (or 22829 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 3121633404 is about 55871.5795731604. The cubic root of 3121633404 is about 1461.4836678505.

Adding to 3121633404 its reverse (4043361213), we get a palindrome (7164994617).

It can be divided in two parts, 31216 and 33404, that added together give a triangular number (64620 = T₃₅₉).

The spelling of 3121633404 in words is "three billion, one hundred twenty-one million, six hundred thirty-three thousand, four hundred four".