5228639640 has 512 divisors, whose sum is σ = 21254400000. Its totient is φ = 1116758016.

The previous prime is 5228639627. The next prime is 5228639671. The reversal of 5228639640 is 469368225.

5228639640 is a `hidden beast` number, since 5 + 2 + 2 + 8 + 639 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12783756 + ... + 12784164.

It is an arithmetic number, because the mean of its divisors is an integer number (41512500).

Almost surely, 2^5228639640 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 5228639640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10627200000).

5228639640 is an abundant number, since it is smaller than the sum of its proper divisors (16025760360).

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

5228639640 is a wasteful number, since it uses less digits than its factorization.

5228639640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 5228639640 is about 72309.3330075724. Note that the first 3 decimals coincide. The cubic root of 5228639640 is about 1735.6530016031.

The spelling of 5228639640 in words is "five billion, two hundred twenty-eight million, six hundred thirty-nine thousand, six hundred forty".