28618297428 has 48 divisors (see below), whose sum is σ = 77755386240. Its totient is φ = 8022378624.

The previous prime is 28618297427. The next prime is 28618297441. The reversal of 28618297428 is 82479281682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28618297427) 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, 3209643 + ... + 3218546.

It is an arithmetic number, because the mean of its divisors is an integer number (1619903880).

Almost surely, 2^28618297428 is an apocalyptic number.

28618297428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28618297428 is an abundant number, since it is smaller than the sum of its proper divisors (49137088812).

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

28618297428 is a wasteful number, since it uses less digits than its factorization.

28618297428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428256 (or 6428254 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The spelling of 28618297428 in words is "twenty-eight billion, six hundred eighteen million, two hundred ninety-seven thousand, four hundred twenty-eight".