5215439988 has 72 divisors (see below), whose sum is σ = 14914667040. Its totient is φ = 1580433120.

The previous prime is 5215439981. The next prime is 5215439993. The reversal of 5215439988 is 8899345125.

5215439988 is a `hidden beast` number, since 5 + 2 + 1 + 543 + 9 + 98 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215439981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233203 + ... + 254586.

Almost surely, 2^5215439988 is an apocalyptic number.

It is an amenable number.

5215439988 is an abundant number, since it is smaller than the sum of its proper divisors (9699227052).

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

5215439988 is a wasteful number, since it uses less digits than its factorization.

5215439988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487819 (or 487805 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 5215439988 is about 72218.0032124954. The cubic root of 5215439988 is about 1734.1912242267.

The spelling of 5215439988 in words is "five billion, two hundred fifteen million, four hundred thirty-nine thousand, nine hundred eighty-eight".