28992038400 has 840 divisors, whose sum is σ = 116465358240. Its totient is φ = 7106641920.

The previous prime is 28992038381. The next prime is 28992038419. The reversal of 28992038400 is 483029982.

It is an interprime number because it is at equal distance from previous prime (28992038381) and next prime (28992038419).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 121305481 + ... + 121305719.

It is an arithmetic number, because the mean of its divisors is an integer number (138649236).

Almost surely, 2^28992038400 is an apocalyptic number.

28992038400 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 28992038400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58232679120).

28992038400 is an abundant number, since it is smaller than the sum of its proper divisors (87473319840).

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

28992038400 is an equidigital number, since it uses as much as digits as its factorization.

28992038400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 28992038400 in words is "twenty-eight billion, nine hundred ninety-two million, thirty-eight thousand, four hundred".