28407257242 has 32 divisors (see below), whose sum is σ = 52953368832. Its totient is φ = 11128921344.

The previous prime is 28407257237. The next prime is 28407257267. The reversal of 28407257242 is 24275270482.

It is a super-2 number, since 2×28407257242² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 738943 + ... + 776434.

It is an arithmetic number, because the mean of its divisors is an integer number (1654792776).

Almost surely, 2^28407257242 is an apocalyptic number.

28407257242 is a deficient number, since it is larger than the sum of its proper divisors (24546111590).

28407257242 is a wasteful number, since it uses less digits than its factorization.

28407257242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515502.

The product of its (nonzero) digits is 501760, while the sum is 43.

The spelling of 28407257242 in words is "twenty-eight billion, four hundred seven million, two hundred fifty-seven thousand, two hundred forty-two".