28100262540 has 192 divisors, whose sum is σ = 96359445504. Its totient is φ = 5972140032.

The previous prime is 28100262529. The next prime is 28100262563. The reversal of 28100262540 is 4526200182.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28100262498 and 28100262507.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 568912 + ... + 616328.

It is an arithmetic number, because the mean of its divisors is an integer number (501872112).

Almost surely, 2^28100262540 is an apocalyptic number.

28100262540 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 28100262540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48179722752).

28100262540 is an abundant number, since it is smaller than the sum of its proper divisors (68259182964).

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

28100262540 is a wasteful number, since it uses less digits than its factorization.

28100262540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47536 (or 47534 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The spelling of 28100262540 in words is "twenty-eight billion, one hundred million, two hundred sixty-two thousand, five hundred forty".