1428587139 has 8 divisors (see below), whose sum is σ = 2176894720. Its totient is φ = 816335496.

The previous prime is 1428587107. The next prime is 1428587141. The reversal of 1428587139 is 9317858241.

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

It is not a de Polignac number, because 1428587139 - 2⁵ = 1428587107 is a prime.

It is a super-2 number, since 2×1428587139² = 4081722427432410642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1428587159) 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, 34013959 + ... + 34014000.

It is an arithmetic number, because the mean of its divisors is an integer number (272111840).

Almost surely, 2^1428587139 is an apocalyptic number.

1428587139 is a deficient number, since it is larger than the sum of its proper divisors (748307581).

1428587139 is an equidigital number, since it uses as much as digits as its factorization.

1428587139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68027969.

The product of its digits is 483840, while the sum is 48.

The square root of 1428587139 is about 37796.6551297863. The cubic root of 1428587139 is about 1126.2520089904.

The spelling of 1428587139 in words is "one billion, four hundred twenty-eight million, five hundred eighty-seven thousand, one hundred thirty-nine".