28345936437 has 48 divisors (see below), whose sum is σ = 52583801088. Its totient is φ = 14301619200.

The previous prime is 28345936403. The next prime is 28345936439. The reversal of 28345936437 is 73463954382.

28345936437 is a `hidden beast` number, since 2 + 8 + 3 + 4 + 593 + 6 + 43 + 7 = 666.

It is not a de Polignac number, because 28345936437 - 2¹⁵ = 28345903669 is a prime.

It is a super-2 number, since 2×28345936437² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28345936439) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 733564 + ... + 771237.

It is an arithmetic number, because the mean of its divisors is an integer number (1095495856).

Almost surely, 2^28345936437 is an apocalyptic number.

It is an amenable number.

28345936437 is a deficient number, since it is larger than the sum of its proper divisors (24237864651).

28345936437 is a wasteful number, since it uses less digits than its factorization.

28345936437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504850 (or 1504847 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The spelling of 28345936437 in words is "twenty-eight billion, three hundred forty-five million, nine hundred thirty-six thousand, four hundred thirty-seven".