28432309740 has 48 divisors (see below), whose sum is σ = 83071795968. Its totient is φ = 7252298944.

The previous prime is 28432309739. The next prime is 28432309769. The reversal of 28432309740 is 4790323482.

It is a junction number, because it is equal to n+sod(n) for n = 28432309692 and 28432309701.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10300182 + ... + 10302941.

It is an arithmetic number, because the mean of its divisors is an integer number (1730662416).

Almost surely, 2^28432309740 is an apocalyptic number.

28432309740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28432309740 is an abundant number, since it is smaller than the sum of its proper divisors (54639486228).

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

28432309740 is a wasteful number, since it uses less digits than its factorization.

28432309740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20603158 (or 20603156 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 28432309740 in words is "twenty-eight billion, four hundred thirty-two million, three hundred nine thousand, seven hundred forty".