28061700 has 72 divisors (see below), whose sum is σ = 82182240. Its totient is φ = 7392000.

The previous prime is 28061681. The next prime is 28061717. The reversal of 28061700 is 716082.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26175 + ... + 27225.

It is an arithmetic number, because the mean of its divisors is an integer number (1141420).

Almost surely, 2^28061700 is an apocalyptic number.

28061700 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 28061700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41091120).

28061700 is an abundant number, since it is smaller than the sum of its proper divisors (54120540).

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

28061700 is a wasteful number, since it uses less digits than its factorization.

28061700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 28061700 is about 5297.3295158976. The cubic root of 28061700 is about 303.8817782462.

Adding to 28061700 its reverse (716082), we get a palindrome (28777782).

The spelling of 28061700 in words is "twenty-eight million, sixty-one thousand, seven hundred".