28621638950 has 24 divisors (see below), whose sum is σ = 56038158120. Its totient is φ = 10846094400.

The previous prime is 28621638949. The next prime is 28621638977. The reversal of 28621638950 is 5983612682.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15063071 + ... + 15064970.

It is an arithmetic number, because the mean of its divisors is an integer number (2334923255).

Almost surely, 2^28621638950 is an apocalyptic number.

28621638950 is a deficient number, since it is larger than the sum of its proper divisors (27416519170).

28621638950 is a wasteful number, since it uses less digits than its factorization.

28621638950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30128072 (or 30128067 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 28621638950 in words is "twenty-eight billion, six hundred twenty-one million, six hundred thirty-eight thousand, nine hundred fifty".