10400280 has 64 divisors (see below), whose sum is σ = 34041600. Its totient is φ = 2520960.

The previous prime is 10400267. The next prime is 10400287. The reversal of 10400280 is 8200401.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10400287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2620 + ... + 5259.

It is an arithmetic number, because the mean of its divisors is an integer number (531900).

Almost surely, 2^10400280 is an apocalyptic number.

10400280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10400280 is an abundant number, since it is smaller than the sum of its proper divisors (23641320).

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

10400280 is a wasteful number, since it uses less digits than its factorization.

10400280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7904 (or 7900 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 10400280 is about 3224.9465111843. The cubic root of 10400280 is about 218.2805355049.

Adding to 10400280 its reverse (8200401), we get a palindrome (18600681).

The spelling of 10400280 in words is "ten million, four hundred thousand, two hundred eighty".