28503645357 has 24 divisors (see below), whose sum is σ = 44231237568. Its totient is φ = 16258760320.

The previous prime is 28503645329. The next prime is 28503645371. The reversal of 28503645357 is 75354630582.

It is a happy number.

It is not a de Polignac number, because 28503645357 - 2¹⁵ = 28503612589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28503645307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2303313 + ... + 2315654.

It is an arithmetic number, because the mean of its divisors is an integer number (1842968232).

Almost surely, 2^28503645357 is an apocalyptic number.

It is an amenable number.

28503645357 is a deficient number, since it is larger than the sum of its proper divisors (15727592211).

28503645357 is a wasteful number, since it uses less digits than its factorization.

28503645357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619009 (or 4618998 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 28503645357 in words is "twenty-eight billion, five hundred three million, six hundred forty-five thousand, three hundred fifty-seven".