1428129109 has 8 divisors (see below), whose sum is σ = 1559543040. Its totient is φ = 1296979200.

The previous prime is 1428129089. The next prime is 1428129121. The reversal of 1428129109 is 9019218241.

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

It is not a de Polignac number, because 1428129109 - 2¹¹ = 1428127061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428129809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54604 + ... + 76405.

It is an arithmetic number, because the mean of its divisors is an integer number (194942880).

Almost surely, 2^1428129109 is an apocalyptic number.

It is an amenable number.

1428129109 is a deficient number, since it is larger than the sum of its proper divisors (131413931).

1428129109 is a wasteful number, since it uses less digits than its factorization.

1428129109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132011.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1428129109 is about 37790.5955099943. The cubic root of 1428129109 is about 1126.1316307663.

The spelling of 1428129109 in words is "one billion, four hundred twenty-eight million, one hundred twenty-nine thousand, one hundred nine".