28040430024 has 24 divisors (see below), whose sum is σ = 75942831510. Its totient is φ = 9346809984.

The previous prime is 28040430023. The next prime is 28040430029. The reversal of 28040430024 is 42003404082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22146797124 + 5893632900 = 148818^2 + 76770^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28040430024.

It is not an unprimeable number, because it can be changed into a prime (28040430023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194725137 + ... + 194725280.

Almost surely, 2^28040430024 is an apocalyptic number.

28040430024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28040430024 is an abundant number, since it is smaller than the sum of its proper divisors (47902401486).

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

28040430024 is a wasteful number, since it uses less digits than its factorization.

28040430024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389450429 (or 389450422 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The spelling of 28040430024 in words is "twenty-eight billion, forty million, four hundred thirty thousand, twenty-four".