1428722136 has 48 divisors (see below), whose sum is σ = 3895110960. Its totient is φ = 473083200.

The previous prime is 1428722131. The next prime is 1428722153. The reversal of 1428722136 is 6312278241.

It is a happy number.

1428722136 is a `hidden beast` number, since 1 + 428 + 7 + 221 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1428722136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428722131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54835 + ... + 76578.

It is an arithmetic number, because the mean of its divisors is an integer number (81148145).

Almost surely, 2^1428722136 is an apocalyptic number.

It is an amenable number.

1428722136 is an abundant number, since it is smaller than the sum of its proper divisors (2466388824).

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

1428722136 is a wasteful number, since it uses less digits than its factorization.

1428722136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131576 (or 131569 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 1428722136 is about 37798.4409202284. The cubic root of 1428722136 is about 1126.2874836328.

It can be divided in two parts, 142 and 8722136, that added together give a palindrome (8722278).

The spelling of 1428722136 in words is "one billion, four hundred twenty-eight million, seven hundred twenty-two thousand, one hundred thirty-six".