1431297280 has 144 divisors (see below), whose sum is σ = 4045353984. Its totient is φ = 474808320.

The previous prime is 1431297209. The next prime is 1431297281. The reversal of 1431297280 is 827921341.

It is a super-2 number, since 2×1431297280² = 4097223807470796800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431297281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275184 + ... + 280336.

It is an arithmetic number, because the mean of its divisors is an integer number (28092736).

Almost surely, 2^1431297280 is an apocalyptic number.

1431297280 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 1431297280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2022676992).

1431297280 is an abundant number, since it is smaller than the sum of its proper divisors (2614056704).

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

1431297280 is an equidigital number, since it uses as much as digits as its factorization.

1431297280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212 (or 5198 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1431297280 is about 37832.4897409621. The cubic root of 1431297280 is about 1126.9637550092.

The spelling of 1431297280 in words is "one billion, four hundred thirty-one million, two hundred ninety-seven thousand, two hundred eighty".