28707413406 has 128 divisors (see below), whose sum is σ = 68248535040. Its totient is φ = 7879565952.

The previous prime is 28707413401. The next prime is 28707413429. The reversal of 28707413406 is 60431470782.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28707413401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74953891 + ... + 74954273.

It is an arithmetic number, because the mean of its divisors is an integer number (533191680).

Almost surely, 2^28707413406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28707413406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34124267520).

28707413406 is an abundant number, since it is smaller than the sum of its proper divisors (39541121634).

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

28707413406 is a wasteful number, since it uses less digits than its factorization.

28707413406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918.

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 28707413406 in words is "twenty-eight billion, seven hundred seven million, four hundred thirteen thousand, four hundred six".