1428013331 has 4 divisors (see below), whose sum is σ = 1477255200. Its totient is φ = 1378771464.

The previous prime is 1428013283. The next prime is 1428013399. The reversal of 1428013331 is 1333108241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1428013331 - 2¹⁰ = 1428012307 is a prime.

It is a super-2 number, since 2×1428013331² = 4078444147027431122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428013331.

It is not an unprimeable number, because it can be changed into a prime (1428012331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24620891 + ... + 24620948.

It is an arithmetic number, because the mean of its divisors is an integer number (369313800).

Almost surely, 2^1428013331 is an apocalyptic number.

1428013331 is a deficient number, since it is larger than the sum of its proper divisors (49241869).

1428013331 is an equidigital number, since it uses as much as digits as its factorization.

1428013331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49241868.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1428013331 is about 37789.0636428054. The cubic root of 1428013331 is about 1126.1011982256.

The spelling of 1428013331 in words is "one billion, four hundred twenty-eight million, thirteen thousand, three hundred thirty-one".