1403272320 has 256 divisors, whose sum is σ = 4782412800. Its totient is φ = 349138944.

The previous prime is 1403272291. The next prime is 1403272349. The reversal of 1403272320 is 232723041.

It is an interprime number because it is at equal distance from previous prime (1403272291) and next prime (1403272349).

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

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, 1898511 + ... + 1899249.

It is an arithmetic number, because the mean of its divisors is an integer number (18681300).

Almost surely, 2^1403272320 is an apocalyptic number.

1403272320 is a gapful number since it is divisible by the number (10) 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 1403272320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2391206400).

1403272320 is an abundant number, since it is smaller than the sum of its proper divisors (3379140480).

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

1403272320 is a wasteful number, since it uses less digits than its factorization.

1403272320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 1403272320 is about 37460.2765606449. The cubic root of 1403272320 is about 1119.5598610699.

Adding to 1403272320 its reverse (232723041), we get a palindrome (1635995361).

The spelling of 1403272320 in words is "one billion, four hundred three million, two hundred seventy-two thousand, three hundred twenty".