672213644 has 24 divisors (see below), whose sum is σ = 1189420848. Its totient is φ = 332400320.

The previous prime is 672213637. The next prime is 672213679. The reversal of 672213644 is 446312276.

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, 133859 + ... + 138789.

It is an arithmetic number, because the mean of its divisors is an integer number (49559202).

Almost surely, 2^672213644 is an apocalyptic number.

It is an amenable number.

672213644 is a deficient number, since it is larger than the sum of its proper divisors (517207204).

672213644 is a wasteful number, since it uses less digits than its factorization.

672213644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305 (or 5303 counting only the distinct ones).

The product of its digits is 48384, while the sum is 35.

The square root of 672213644 is about 25927.0832142761. The cubic root of 672213644 is about 875.9966413555.

The spelling of 672213644 in words is "six hundred seventy-two million, two hundred thirteen thousand, six hundred forty-four".