1427896728 has 64 divisors (see below), whose sum is σ = 3972952800. Its totient is φ = 475176960.

The previous prime is 1427896727. The next prime is 1427896733. The reversal of 1427896728 is 8276987241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427896727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133300 + ... + 143612.

Almost surely, 2^1427896728 is an apocalyptic number.

1427896728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1427896728 is an abundant number, since it is smaller than the sum of its proper divisors (2545056072).

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

1427896728 is a wasteful number, since it uses less digits than its factorization.

1427896728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10969 (or 10959 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 1427896728 is about 37787.5207972156. The cubic root of 1427896728 is about 1126.0705471691.

The spelling of 1427896728 in words is "one billion, four hundred twenty-seven million, eight hundred ninety-six thousand, seven hundred twenty-eight".