28578485444 has 6 divisors (see below), whose sum is σ = 50012349534. Its totient is φ = 14289242720.

The previous prime is 28578485423. The next prime is 28578485461. The reversal of 28578485444 is 44458487582.

It can be written as a sum of positive squares in only one way, i.e., 17905116100 + 10673369344 = 133810^2 + 103312^2 .

It is a super-3 number, since 3×28578485444³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3572310677 + ... + 3572310684.

It is an arithmetic number, because the mean of its divisors is an integer number (8335391589).

Almost surely, 2^28578485444 is an apocalyptic number.

It is an amenable number.

28578485444 is a deficient number, since it is larger than the sum of its proper divisors (21433864090).

28578485444 is a wasteful number, since it uses less digits than its factorization.

28578485444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144621365 (or 7144621363 counting only the distinct ones).

The product of its digits is 45875200, while the sum is 59.

The spelling of 28578485444 in words is "twenty-eight billion, five hundred seventy-eight million, four hundred eighty-five thousand, four hundred forty-four".