643023274 has 16 divisors (see below), whose sum is σ = 982909440. Its totient is φ = 315433440.

The previous prime is 643023257. The next prime is 643023281. The reversal of 643023274 is 472320346.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16357 + ... + 39415.

It is an arithmetic number, because the mean of its divisors is an integer number (61431840).

Almost surely, 2^643023274 is an apocalyptic number.

643023274 is a deficient number, since it is larger than the sum of its proper divisors (339886166).

643023274 is a wasteful number, since it uses less digits than its factorization.

643023274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23325.

The product of its (nonzero) digits is 24192, while the sum is 31.

The square root of 643023274 is about 25357.9035805407. The cubic root of 643023274 is about 863.1287128877.

It can be divided in two parts, 64302 and 3274, that added together give a palindrome (67576).

The spelling of 643023274 in words is "six hundred forty-three million, twenty-three thousand, two hundred seventy-four".