1428656297 has 4 divisors (see below), whose sum is σ = 1474742016. Its totient is φ = 1382570580.

The previous prime is 1428656291. The next prime is 1428656311. The reversal of 1428656297 is 7926568241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7926568241 = 40939 ⋅193619.

It is a cyclic number.

It is not a de Polignac number, because 1428656297 - 2⁶ = 1428656233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428656291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23042813 + ... + 23042874.

It is an arithmetic number, because the mean of its divisors is an integer number (368685504).

Almost surely, 2^1428656297 is an apocalyptic number.

It is an amenable number.

1428656297 is a deficient number, since it is larger than the sum of its proper divisors (46085719).

1428656297 is an equidigital number, since it uses as much as digits as its factorization.

1428656297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46085718.

The product of its digits is 1451520, while the sum is 50.

The square root of 1428656297 is about 37797.5699880297. The cubic root of 1428656297 is about 1126.2701826758.

The spelling of 1428656297 in words is "one billion, four hundred twenty-eight million, six hundred fifty-six thousand, two hundred ninety-seven".