1428636365 has 8 divisors (see below), whose sum is σ = 1846237848. Its totient is φ = 1054992960.

The previous prime is 1428636347. The next prime is 1428636371. The reversal of 1428636365 is 5636368241.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17732521 + 1410903844 = 4211^2 + 37562^2 .

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

It is not a de Polignac number, because 1428636365 - 2¹² = 1428632269 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10989446 + ... + 10989575.

It is an arithmetic number, because the mean of its divisors is an integer number (230779731).

Almost surely, 2^1428636365 is an apocalyptic number.

It is an amenable number.

1428636365 is a deficient number, since it is larger than the sum of its proper divisors (417601483).

1428636365 is a wasteful number, since it uses less digits than its factorization.

1428636365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21979039.

The product of its digits is 622080, while the sum is 44.

The square root of 1428636365 is about 37797.3063193662. The cubic root of 1428636365 is about 1126.2649449052.

The spelling of 1428636365 in words is "one billion, four hundred twenty-eight million, six hundred thirty-six thousand, three hundred sixty-five".