6428188540 has 24 divisors (see below), whose sum is σ = 13720496832. Its totient is φ = 2529122880.

The previous prime is 6428188537. The next prime is 6428188553. The reversal of 6428188540 is 458818246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2633284 + ... + 2635723.

It is an arithmetic number, because the mean of its divisors is an integer number (571687368).

Almost surely, 2^6428188540 is an apocalyptic number.

It is an amenable number.

6428188540 is an abundant number, since it is smaller than the sum of its proper divisors (7292308292).

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

6428188540 is a wasteful number, since it uses less digits than its factorization.

6428188540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269077 (or 5269075 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 46.

The square root of 6428188540 is about 80175.9848084200. The cubic root of 6428188540 is about 1859.3573665404.

The spelling of 6428188540 in words is "six billion, four hundred twenty-eight million, one hundred eighty-eight thousand, five hundred forty".