1428085906 has 16 divisors (see below), whose sum is σ = 2339402688. Its totient is φ = 649832400.

The previous prime is 1428085903. The next prime is 1428085909. The reversal of 1428085906 is 6095808241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1428085903) and next prime (1428085909).

It is not an unprimeable number, because it can be changed into a prime (1428085903) 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, 384960 + ... + 388651.

It is an arithmetic number, because the mean of its divisors is an integer number (146212668).

Almost surely, 2^1428085906 is an apocalyptic number.

1428085906 is a deficient number, since it is larger than the sum of its proper divisors (911316782).

1428085906 is a wasteful number, since it uses less digits than its factorization.

1428085906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773697.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1428085906 is about 37790.0238952028. The cubic root of 1428085906 is about 1126.1202749406.

The spelling of 1428085906 in words is "one billion, four hundred twenty-eight million, eighty-five thousand, nine hundred six".