28191213050 has 288 divisors, whose sum is σ = 74826460800. Its totient is φ = 7629926400.

The previous prime is 28191213019. The next prime is 28191213107. The reversal of 28191213050 is 5031219182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28191212998 and 28191213016.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14463476 + ... + 14465424.

It is an arithmetic number, because the mean of its divisors is an integer number (259814100).

Almost surely, 2^28191213050 is an apocalyptic number.

28191213050 is an abundant number, since it is smaller than the sum of its proper divisors (46635247750).

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

28191213050 is a wasteful number, since it uses less digits than its factorization.

28191213050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2004 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 28191213050 in words is "twenty-eight billion, one hundred ninety-one million, two hundred thirteen thousand, fifty".