28340170452 has 72 divisors (see below), whose sum is σ = 81548026560. Its totient is φ = 8214539520.

The previous prime is 28340170421. The next prime is 28340170459. The reversal of 28340170452 is 25407104382.

It is a happy number.

28340170452 is a `hidden beast` number, since 2 + 8 + 34 + 0 + 170 + 452 = 666.

It is a super-2 number, since 2×28340170452² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28340170459) 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, 1546677 + ... + 1564892.

It is an arithmetic number, because the mean of its divisors is an integer number (1132611480).

Almost surely, 2^28340170452 is an apocalyptic number.

28340170452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28340170452 is an abundant number, since it is smaller than the sum of its proper divisors (53207856108).

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

28340170452 is a wasteful number, since it uses less digits than its factorization.

28340170452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111613 (or 3111608 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 28340170452 in words is "twenty-eight billion, three hundred forty million, one hundred seventy thousand, four hundred fifty-two".