28458260440 has 32 divisors (see below), whose sum is σ = 67797622080. Its totient is φ = 10713697792.

The previous prime is 28458260437. The next prime is 28458260447. The reversal of 28458260440 is 4406285482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28458260447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20924512 + ... + 20925871.

It is an arithmetic number, because the mean of its divisors is an integer number (2118675690).

Almost surely, 2^28458260440 is an apocalyptic number.

28458260440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28458260440 is an abundant number, since it is smaller than the sum of its proper divisors (39339361640).

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

28458260440 is a wasteful number, since it uses less digits than its factorization.

28458260440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41850411 (or 41850407 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 43.

The spelling of 28458260440 in words is "twenty-eight billion, four hundred fifty-eight million, two hundred sixty thousand, four hundred forty".