28706248620 has 432 divisors, whose sum is σ = 109166174208. Its totient is φ = 5973903360.

The previous prime is 28706248619. The next prime is 28706248661. The reversal of 28706248620 is 2684260782.

28706248620 is a `hidden beast` number, since 28 + 70 + 62 + 486 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 143 ways as a sum of consecutive naturals, for example, 11287069 + ... + 11289611.

Almost surely, 2^28706248620 is an apocalyptic number.

28706248620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28706248620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54583087104).

28706248620 is an abundant number, since it is smaller than the sum of its proper divisors (80459925588).

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

28706248620 is a wasteful number, since it uses less digits than its factorization.

28706248620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630 (or 2608 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 28706248620 in words is "twenty-eight billion, seven hundred six million, two hundred forty-eight thousand, six hundred twenty".