1428356636 has 24 divisors (see below), whose sum is σ = 2858079840. Its totient is φ = 611860032.

The previous prime is 1428356599. The next prime is 1428356653. The reversal of 1428356636 is 6366538241.

It is a happy 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, 53606 + ... + 75698.

It is an arithmetic number, because the mean of its divisors is an integer number (119086660).

Almost surely, 2^1428356636 is an apocalyptic number.

It is an amenable number.

1428356636 is an abundant number, since it is smaller than the sum of its proper divisors (1429723204).

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

1428356636 is a wasteful number, since it uses less digits than its factorization.

1428356636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24413 (or 24411 counting only the distinct ones).

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

The square root of 1428356636 is about 37793.6057554714. The cubic root of 1428356636 is about 1126.1914320228.

The spelling of 1428356636 in words is "one billion, four hundred twenty-eight million, three hundred fifty-six thousand, six hundred thirty-six".