28226454516 has 72 divisors (see below), whose sum is σ = 76990291560. Its totient is φ = 8667926784.

The previous prime is 28226454499. The next prime is 28226454541. The reversal of 28226454516 is 61545462282.

28226454516 is a `hidden beast` number, since 2 + 8 + 22 + 64 + 54 + 516 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 464230116 + 27762224400 = 21546^2 + 166620^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178966 + ... + 297458.

It is an arithmetic number, because the mean of its divisors is an integer number (1069309605).

Almost surely, 2^28226454516 is an apocalyptic number.

28226454516 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28226454516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38495145780).

28226454516 is an abundant number, since it is smaller than the sum of its proper divisors (48763837044).

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

28226454516 is a wasteful number, since it uses less digits than its factorization.

28226454516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119025 (or 119020 counting only the distinct ones).

The product of its digits is 921600, while the sum is 45.

The spelling of 28226454516 in words is "twenty-eight billion, two hundred twenty-six million, four hundred fifty-four thousand, five hundred sixteen".