28071521046 has 24 divisors (see below), whose sum is σ = 62465458224. Its totient is φ = 9104276880.

The previous prime is 28071521041. The next prime is 28071521059. The reversal of 28071521046 is 64012517082.

28071521046 is a `hidden beast` number, since 28 + 0 + 71 + 521 + 0 + 46 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28071521046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28071521041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21074050 + ... + 21075381.

It is an arithmetic number, because the mean of its divisors is an integer number (2602727426).

Almost surely, 2^28071521046 is an apocalyptic number.

28071521046 is an abundant number, since it is smaller than the sum of its proper divisors (34393937178).

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

28071521046 is a wasteful number, since it uses less digits than its factorization.

28071521046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42149476 (or 42149473 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 28071521046 in words is "twenty-eight billion, seventy-one million, five hundred twenty-one thousand, forty-six".