28537533850 has 36 divisors (see below), whose sum is σ = 61745910174. Its totient is φ = 9784296480.

The previous prime is 28537533841. The next prime is 28537533859. The reversal of 28537533850 is 5833573582.

It is an interprime number because it is at equal distance from previous prime (28537533841) and next prime (28537533859).

It can be written as a sum of positive squares in 3 ways, for example, as 24260243049 + 4277290801 = 155757^2 + 65401^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 28537533794 and 28537533803.

It is not an unprimeable number, because it can be changed into a prime (28537533859) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5821537 + ... + 5826436.

Almost surely, 2^28537533850 is an apocalyptic number.

28537533850 is an abundant number, since it is smaller than the sum of its proper divisors (33208376324).

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

28537533850 is a wasteful number, since it uses less digits than its factorization.

28537533850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11647999 (or 11647987 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 49.

It can be divided in two parts, 285375 and 33850, that added together give a square (319225 = 565²).

The spelling of 28537533850 in words is "twenty-eight billion, five hundred thirty-seven million, five hundred thirty-three thousand, eight hundred fifty".