1428587093 has 4 divisors (see below), whose sum is σ = 1428748608. Its totient is φ = 1428425580.

The previous prime is 1428587081. The next prime is 1428587101. The reversal of 1428587093 is 3907858241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1428587093 - 2¹⁴ = 1428570709 is a prime.

It is a super-2 number, since 2×1428587093² = 4081722164572381298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428587023) 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, 66671 + ... + 85452.

It is an arithmetic number, because the mean of its divisors is an integer number (357187152).

Almost surely, 2^1428587093 is an apocalyptic number.

It is an amenable number.

1428587093 is a deficient number, since it is larger than the sum of its proper divisors (161515).

1428587093 is an equidigital number, since it uses as much as digits as its factorization.

1428587093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161514.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 1428587093 is about 37796.6545212668. The cubic root of 1428587093 is about 1126.2519969021.

The spelling of 1428587093 in words is "one billion, four hundred twenty-eight million, five hundred eighty-seven thousand, ninety-three".