1428177629 has 4 divisors (see below), whose sum is σ = 1428268380. Its totient is φ = 1428086880.

The previous prime is 1428177613. The next prime is 1428177643. The reversal of 1428177629 is 9267718241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9267718241 = 103 ⋅89977847.

It can be written as a sum of positive squares in 2 ways, for example, as 40615129 + 1387562500 = 6373^2 + 37250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428177629 - 2⁴ = 1428177613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428177649) 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 3 ways as a sum of consecutive naturals, for example, 14984 + ... + 55505.

It is an arithmetic number, because the mean of its divisors is an integer number (357067095).

Almost surely, 2^1428177629 is an apocalyptic number.

It is an amenable number.

1428177629 is a deficient number, since it is larger than the sum of its proper divisors (90751).

1428177629 is an equidigital number, since it uses as much as digits as its factorization.

1428177629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90750.

The product of its digits is 338688, while the sum is 47.

The square root of 1428177629 is about 37791.2374632004. The cubic root of 1428177629 is about 1126.1443838821.

The spelling of 1428177629 in words is "one billion, four hundred twenty-eight million, one hundred seventy-seven thousand, six hundred twenty-nine".