1028406694 has 8 divisors (see below), whose sum is σ = 1762982928. Its totient is φ = 440745720.

The previous prime is 1028406683. The next prime is 1028406703. The reversal of 1028406694 is 4966048201.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36728797 + ... + 36728824.

It is an arithmetic number, because the mean of its divisors is an integer number (220372866).

Almost surely, 2^1028406694 is an apocalyptic number.

1028406694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1028406694 is a deficient number, since it is larger than the sum of its proper divisors (734576234).

1028406694 is an equidigital number, since it uses as much as digits as its factorization.

1028406694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73457630.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1028406694 is about 32068.7806752923. The cubic root of 1028406694 is about 1009.3806266899.

The spelling of 1028406694 in words is "one billion, twenty-eight million, four hundred six thousand, six hundred ninety-four".