28745278922040 has 64 divisors (see below), whose sum is σ = 91308533052960. Its totient is φ = 7214501376000.

The previous prime is 28745278922033. The next prime is 28745278922053. The reversal of 28745278922040 is 4022987254782.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7045409461 + ... + 7045413540.

Almost surely, 2^{28745278922040} is an apocalyptic number.

28745278922040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28745278922040 is an abundant number, since it is smaller than the sum of its proper divisors (62563254130920).

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

28745278922040 is a wasteful number, since it uses less digits than its factorization.

28745278922040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14090823032 (or 14090823028 counting only the distinct ones).

The product of its (nonzero) digits is 36126720, while the sum is 60.

The spelling of 28745278922040 in words is "twenty-eight trillion, seven hundred forty-five billion, two hundred seventy-eight million, nine hundred twenty-two thousand, forty".