3138521004 has 216 divisors, whose sum is σ = 8821966608. Its totient is φ = 939651840.

The previous prime is 3138520961. The next prime is 3138521017. The reversal of 3138521004 is 4001258313.

It is a happy number.

3138521004 is a `hidden beast` number, since 3 + 138 + 521 + 0 + 0 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 29331919 + ... + 29332025.

It is an arithmetic number, because the mean of its divisors is an integer number (40842438).

Almost surely, 2^3138521004 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 3138521004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4410983304).

3138521004 is an abundant number, since it is smaller than the sum of its proper divisors (5683445604).

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

3138521004 is a wasteful number, since it uses less digits than its factorization.

3138521004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 3138521004 is about 56022.5044424114. The cubic root of 3138521004 is about 1464.1144036281.

Adding to 3138521004 its reverse (4001258313), we get a palindrome (7139779317).

The spelling of 3138521004 in words is "three billion, one hundred thirty-eight million, five hundred twenty-one thousand, four".