1426678309 has 8 divisors (see below), whose sum is σ = 1657219328. Its totient is φ = 1202819760.

The previous prime is 1426678303. The next prime is 1426678313. The reversal of 1426678309 is 9038766241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1426678309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426678303) 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, 1670157 + ... + 1671010.

It is an arithmetic number, because the mean of its divisors is an integer number (207152416).

Almost surely, 2^1426678309 is an apocalyptic number.

It is an amenable number.

1426678309 is a deficient number, since it is larger than the sum of its proper divisors (230541019).

1426678309 is an equidigital number, since it uses as much as digits as its factorization.

1426678309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341235.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1426678309 is about 37771.3953806316. The cubic root of 1426678309 is about 1125.7501654131.

The spelling of 1426678309 in words is "one billion, four hundred twenty-six million, six hundred seventy-eight thousand, three hundred nine".