28733031474 has 128 divisors (see below), whose sum is σ = 72699420672. Its totient is φ = 7376624640.

The previous prime is 28733031463. The next prime is 28733031493. The reversal of 28733031474 is 47413033782.

It is a happy number.

It is a super-2 number, since 2×28733031474² (a number of 22 digits) contains 22 as substring.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10853619 + ... + 10856265.

It is an arithmetic number, because the mean of its divisors is an integer number (567964224).

Almost surely, 2^28733031474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28733031474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36349710336).

28733031474 is an abundant number, since it is smaller than the sum of its proper divisors (43966389198).

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

28733031474 is a wasteful number, since it uses less digits than its factorization.

28733031474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360.

The product of its (nonzero) digits is 338688, while the sum is 42.

The spelling of 28733031474 in words is "twenty-eight billion, seven hundred thirty-three million, thirty-one thousand, four hundred seventy-four".