4280400 has 180 divisors, whose sum is σ = 15741180. Its totient is φ = 1075200.

The previous prime is 4280399. The next prime is 4280407. The reversal of 4280400 is 40824.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 685584 + 3594816 = 828^2 + 1896^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4280407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 104380 + ... + 104420.

It is an arithmetic number, because the mean of its divisors is an integer number (87451).

Almost surely, 2^4280400 is an apocalyptic number.

4280400 is a gapful number since it is divisible by the number (40) 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 4280400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7870590).

4280400 is an abundant number, since it is smaller than the sum of its proper divisors (11460780).

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

4280400 is a wasteful number, since it uses less digits than its factorization.

4280400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 4280400 is about 2068.9127579480. The cubic root of 4280400 is about 162.3658853981.

The spelling of 4280400 in words is "four million, two hundred eighty thousand, four hundred".