28377139500 has 288 divisors, whose sum is σ = 95148406080. Its totient is φ = 7094937600.

The previous prime is 28377139481. The next prime is 28377139573. The reversal of 28377139500 is 593177382.

It is a happy number.

28377139500 is a `hidden beast` number, since 2 + 8 + 3 + 7 + 7 + 139 + 500 = 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 (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26544966 + ... + 26546034.

It is an arithmetic number, because the mean of its divisors is an integer number (330376410).

Almost surely, 2^28377139500 is an apocalyptic number.

28377139500 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 28377139500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47574203040).

28377139500 is an abundant number, since it is smaller than the sum of its proper divisors (66771266580).

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

28377139500 is a wasteful number, since it uses less digits than its factorization.

28377139500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 28377139500 in words is "twenty-eight billion, three hundred seventy-seven million, one hundred thirty-nine thousand, five hundred".