645000334 has 16 divisors (see below), whose sum is σ = 1111006080. Its totient is φ = 277751160.

The previous prime is 645000287. The next prime is 645000337. The reversal of 645000334 is 433000546.

It is a super-2 number, since 2×645000334² = 832050861720223112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645000299 and 645000308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645000337) 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, 771114 + ... + 771949.

It is an arithmetic number, because the mean of its divisors is an integer number (69437880).

Almost surely, 2^645000334 is an apocalyptic number.

645000334 is a deficient number, since it is larger than the sum of its proper divisors (466005746).

645000334 is a wasteful number, since it uses less digits than its factorization.

645000334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543095.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 645000334 is about 25396.8567740183. The cubic root of 645000334 is about 864.0124089081.

The spelling of 645000334 in words is "six hundred forty-five million, three hundred thirty-four", and thus it is an aban number.