28615454140 has 240 divisors, whose sum is σ = 78818257728. Its totient is φ = 8658220032.

The previous prime is 28615454099. The next prime is 28615454149. The reversal of 28615454140 is 4145451682.

It is a junction number, because it is equal to n+sod(n) for n = 28615454093 and 28615454102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28615454149) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 14356984 + ... + 14358976.

Almost surely, 2^28615454140 is an apocalyptic number.

28615454140 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 28615454140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39409128864).

28615454140 is an abundant number, since it is smaller than the sum of its proper divisors (50202803588).

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

28615454140 is a wasteful number, since it uses less digits than its factorization.

28615454140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066 (or 2043 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 28615454140 in words is "twenty-eight billion, six hundred fifteen million, four hundred fifty-four thousand, one hundred forty".