28420495488 has 1152 divisors, whose sum is σ = 114442776000. Its totient is φ = 6897623040.

The previous prime is 28420495409. The next prime is 28420495511. The reversal of 28420495488 is 88459402482.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 389321820 + ... + 389321892.

Almost surely, 2^28420495488 is an apocalyptic number.

28420495488 is a gapful number since it is divisible by the number (28) 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 28420495488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57221388000).

28420495488 is an abundant number, since it is smaller than the sum of its proper divisors (86022280512).

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

28420495488 is a wasteful number, since it uses less digits than its factorization.

28420495488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 28420495488 in words is "twenty-eight billion, four hundred twenty million, four hundred ninety-five thousand, four hundred eighty-eight".