1449431280 has 320 divisors, whose sum is σ = 5553930240. Its totient is φ = 344448000.

The previous prime is 1449431251. The next prime is 1449431287. The reversal of 1449431280 is 821349441.

It is a happy number.

1449431280 is a `hidden beast` number, since 144 + 9 + 431 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1449431287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1258705 + ... + 1259855.

It is an arithmetic number, because the mean of its divisors is an integer number (17356032).

Almost surely, 2^1449431280 is an apocalyptic number.

1449431280 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 1449431280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2776965120).

1449431280 is an abundant number, since it is smaller than the sum of its proper divisors (4104498960).

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

1449431280 is a wasteful number, since it uses less digits than its factorization.

1449431280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1449431280 is about 38071.3971374837. The cubic root of 1449431280 is about 1131.7031981264.

The spelling of 1449431280 in words is "one billion, four hundred forty-nine million, four hundred thirty-one thousand, two hundred eighty".