28210513450 has 48 divisors (see below), whose sum is σ = 60517733760. Its totient is φ = 9583427520.

The previous prime is 28210513447. The next prime is 28210513451. The reversal of 28210513450 is 5431501282.

It is a super-2 number, since 2×28210513450² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28210513451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331582 + ... + 407881.

It is an arithmetic number, because the mean of its divisors is an integer number (1260786120).

Almost surely, 2^28210513450 is an apocalyptic number.

28210513450 is an abundant number, since it is smaller than the sum of its proper divisors (32307220310).

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

28210513450 is a wasteful number, since it uses less digits than its factorization.

28210513450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739591 (or 739586 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 28210513450 in words is "twenty-eight billion, two hundred ten million, five hundred thirteen thousand, four hundred fifty".