28440448730 has 16 divisors (see below), whose sum is σ = 52844189184. Its totient is φ = 11009205840.

The previous prime is 28440448723. The next prime is 28440448733. The reversal of 28440448730 is 3784404482.

It is a super-2 number, since 2×28440448730² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28440448733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45871382 + ... + 45872001.

It is an arithmetic number, because the mean of its divisors is an integer number (3302761824).

Almost surely, 2^28440448730 is an apocalyptic number.

28440448730 is a deficient number, since it is larger than the sum of its proper divisors (24403740454).

28440448730 is a wasteful number, since it uses less digits than its factorization.

28440448730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91743421.

The product of its (nonzero) digits is 688128, while the sum is 44.

The spelling of 28440448730 in words is "twenty-eight billion, four hundred forty million, four hundred forty-eight thousand, seven hundred thirty".