28571400 has 384 divisors, whose sum is σ = 118742400. Its totient is φ = 6220800.

The previous prime is 28571381. The next prime is 28571401. The reversal of 28571400 is 417582.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571401) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 772182 + ... + 772218.

It is an arithmetic number, because the mean of its divisors is an integer number (309225).

Almost surely, 2^28571400 is an apocalyptic number.

28571400 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 28571400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59371200).

28571400 is an abundant number, since it is smaller than the sum of its proper divisors (90171000).

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

28571400 is a wasteful number, since it uses less digits than its factorization.

28571400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28571400 is about 5345.2221656354. Note that the first 3 decimals coincide. The cubic root of 28571400 is about 305.7106068293.

Adding to 28571400 its reverse (417582), we get a palindrome (28988982).

The spelling of 28571400 in words is "twenty-eight million, five hundred seventy-one thousand, four hundred".