6400428080 has 40 divisors (see below), whose sum is σ = 14885943072. Its totient is φ = 2559320064.

The previous prime is 6400428079. The next prime is 6400428119. The reversal of 6400428080 is 808240046.

It is a tau number, because it is divible by the number of its divisors (40).

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, 264989 + ... + 288131.

Almost surely, 2^6400428080 is an apocalyptic number.

It is an amenable number.

6400428080 is an abundant number, since it is smaller than the sum of its proper divisors (8485514992).

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

6400428080 is a wasteful number, since it uses less digits than its factorization.

6400428080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26613 (or 26607 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 6400428080 is about 80002.6754552621. The cubic root of 6400428080 is about 1856.6769277586.

The spelling of 6400428080 in words is "six billion, four hundred million, four hundred twenty-eight thousand, eighty".