28619503929 has 15 divisors (see below), whose sum is σ = 42754866847. Its totient is φ = 19078654248.

The previous prime is 28619503919. The next prime is 28619503943. The reversal of 28619503929 is 92930591682.

It is a happy number.

The square root of 28619503929 is 169173.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 23726781225 + 4892722704 = 154035^2 + 69948^2 .

It is not a de Polignac number, because 28619503929 - 2¹¹ = 28619501881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28619503919) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1513159 + ... + 1531955.

Almost surely, 2^28619503929 is an apocalyptic number.

28619503929 is the 169173-rd square number.

28619503929 is the 84587-th centered octagonal number.

It is an amenable number.

28619503929 is a deficient number, since it is larger than the sum of its proper divisors (14135362918).

28619503929 is an frugal number, since it uses more digits than its factorization.

28619503929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37606 (or 18800 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 28619503929 in words is "twenty-eight billion, six hundred nineteen million, five hundred three thousand, nine hundred twenty-nine".