28970544990 has 32 divisors (see below), whose sum is σ = 71926872480. Its totient is φ = 7459082624.

The previous prime is 28970544983. The next prime is 28970544991. The reversal of 28970544990 is 9944507982.

It is a super-2 number, since 2×28970544990² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28970544990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28970544991) 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, 16648869 + ... + 16650608.

It is an arithmetic number, because the mean of its divisors is an integer number (2247714765).

Almost surely, 2^28970544990 is an apocalyptic number.

28970544990 is an abundant number, since it is smaller than the sum of its proper divisors (42956327490).

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

28970544990 is a wasteful number, since it uses less digits than its factorization.

28970544990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33299516.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 28970544990 in words is "twenty-eight billion, nine hundred seventy million, five hundred forty-four thousand, nine hundred ninety".