28370900 has 54 divisors (see below), whose sum is σ = 63369642. Its totient is φ = 11024000.

The previous prime is 28370887. The next prime is 28370929. The reversal of 28370900 is 907382.

It can be written as a sum of positive squares in 9 ways, for example, as 4624 + 28366276 = 68^2 + 5326^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 280850 + ... + 280950.

Almost surely, 2^28370900 is an apocalyptic number.

28370900 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 28370900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31684821).

28370900 is an abundant number, since it is smaller than the sum of its proper divisors (34998742).

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

28370900 is a wasteful number, since it uses less digits than its factorization.

28370900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 28370900 is about 5326.4340791941. The cubic root of 28370900 is about 304.9938187406.

The spelling of 28370900 in words is "twenty-eight million, three hundred seventy thousand, nine hundred".