34991985 has 32 divisors (see below), whose sum is σ = 64438272. Its totient is φ = 15883200.

The previous prime is 34991959. The next prime is 34991987. The reversal of 34991985 is 58919943.

It is not a de Polignac number, because 34991985 - 2⁵ = 34991953 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (34991987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14752 + ... + 16958.

It is an arithmetic number, because the mean of its divisors is an integer number (2013696).

Almost surely, 2^34991985 is an apocalyptic number.

34991985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

34991985 is a deficient number, since it is larger than the sum of its proper divisors (29446287).

34991985 is a wasteful number, since it uses less digits than its factorization.

34991985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373.

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

The square root of 34991985 is about 5915.4023531794. The cubic root of 34991985 is about 327.0816599731.

The spelling of 34991985 in words is "thirty-four million, nine hundred ninety-one thousand, nine hundred eighty-five".