403025280 has 256 divisors, whose sum is σ = 1485250560. Its totient is φ = 91054080.

The previous prime is 403025263. The next prime is 403025291. The reversal of 403025280 is 82520304.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 403025280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2109985 + ... + 2110175.

It is an arithmetic number, because the mean of its divisors is an integer number (5801760).

Almost surely, 2^403025280 is an apocalyptic number.

403025280 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 403025280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742625280).

403025280 is an abundant number, since it is smaller than the sum of its proper divisors (1082225280).

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

403025280 is a wasteful number, since it uses less digits than its factorization.

403025280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 403025280 is about 20075.4895332592. The cubic root of 403025280 is about 738.6591741316.

Adding to 403025280 its reverse (82520304), we get a palindrome (485545584).

The spelling of 403025280 in words is "four hundred three million, twenty-five thousand, two hundred eighty".