1280428327 has 8 divisors (see below), whose sum is σ = 1317731472. Its totient is φ = 1243267200.

The previous prime is 1280428307. The next prime is 1280428337. The reversal of 1280428327 is 7238240821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280428327 - 2²⁷ = 1146210599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280428307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17074 + ... + 53407.

It is an arithmetic number, because the mean of its divisors is an integer number (164716434).

Almost surely, 2^1280428327 is an apocalyptic number.

1280428327 is a deficient number, since it is larger than the sum of its proper divisors (37303145).

1280428327 is an equidigital number, since it uses as much as digits as its factorization.

1280428327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71009.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 1280428327 is about 35783.0731911053. The cubic root of 1280428327 is about 1085.8881433767. Note that the first 3 decimals are identical.

The spelling of 1280428327 in words is "one billion, two hundred eighty million, four hundred twenty-eight thousand, three hundred twenty-seven".