428880040040 has 32 divisors (see below), whose sum is σ = 965012908680. Its totient is φ = 171546181632.

The previous prime is 428880040019. The next prime is 428880040081. The reversal of 428880040040 is 40040088824.

It can be written as a sum of positive squares in 4 ways, for example, as 226079328484 + 202800711556 = 475478^2 + 450334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 428880039976 and 428880040003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124084 + ... + 1456476.

Almost surely, 2^428880040040 is an apocalyptic number.

428880040040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428880040040 is an abundant number, since it is smaller than the sum of its proper divisors (536132868640).

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

428880040040 is a wasteful number, since it uses less digits than its factorization.

428880040040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364661 (or 364657 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 38.

The spelling of 428880040040 in words is "four hundred twenty-eight billion, eight hundred eighty million, forty thousand, forty".