28742624782 has 4 divisors (see below), whose sum is σ = 43113937176. Its totient is φ = 14371312390.

The previous prime is 28742624773. The next prime is 28742624803.

It is a happy number.

28742624782 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28742624782² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7185656194 + ... + 7185656197.

It is an arithmetic number, because the mean of its divisors is an integer number (10778484294).

Almost surely, 2^28742624782 is an apocalyptic number.

28742624782 is a deficient number, since it is larger than the sum of its proper divisors (14371312394).

28742624782 is a wasteful number, since it uses less digits than its factorization.

28742624782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14371312393.

The product of its digits is 4816896, while the sum is 52.

The spelling of 28742624782 in words is "twenty-eight billion, seven hundred forty-two million, six hundred twenty-four thousand, seven hundred eighty-two".