1016399685 has 32 divisors (see below), whose sum is σ = 1922653440. Its totient is φ = 448616448.

The previous prime is 1016399677. The next prime is 1016399707. The reversal of 1016399685 is 5869936101.

It is not a de Polignac number, because 1016399685 - 2³ = 1016399677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163852 + ... + 169941.

It is an arithmetic number, because the mean of its divisors is an integer number (60082920).

Almost surely, 2^1016399685 is an apocalyptic number.

1016399685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1016399685 is a deficient number, since it is larger than the sum of its proper divisors (906253755).

1016399685 is a wasteful number, since it uses less digits than its factorization.

1016399685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333837.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 1016399685 is about 31881.0239013743. The cubic root of 1016399685 is about 1005.4369476937.

The spelling of 1016399685 in words is "one billion, sixteen million, three hundred ninety-nine thousand, six hundred eighty-five".