28904047746 has 32 divisors (see below), whose sum is σ = 66073822848. Its totient is φ = 8257370880.

The previous prime is 28904047741. The next prime is 28904047771. The reversal of 28904047746 is 64774040982.

It is a happy number.

It is a super-2 number, since 2×28904047746² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28904047741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397066 + ... + 464186.

It is an arithmetic number, because the mean of its divisors is an integer number (2064806964).

Almost surely, 2^28904047746 is an apocalyptic number.

28904047746 is an abundant number, since it is smaller than the sum of its proper divisors (37169775102).

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

28904047746 is a wasteful number, since it uses less digits than its factorization.

28904047746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77386.

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 28904047746 in words is "twenty-eight billion, nine hundred four million, forty-seven thousand, seven hundred forty-six".