672226420 has 12 divisors (see below), whose sum is σ = 1411675524. Its totient is φ = 268890560.

The previous prime is 672226417. The next prime is 672226433. The reversal of 672226420 is 24622276.

It can be written as a sum of positive squares in 2 ways, for example, as 192265956 + 479960464 = 13866^2 + 21908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16805641 + ... + 16805680.

It is an arithmetic number, because the mean of its divisors is an integer number (117639627).

Almost surely, 2^672226420 is an apocalyptic number.

It is an amenable number.

672226420 is an abundant number, since it is smaller than the sum of its proper divisors (739449104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

672226420 is a wasteful number, since it uses less digits than its factorization.

672226420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33611330 (or 33611328 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 672226420 is about 25927.3295963931. The cubic root of 672226420 is about 876.0021910108.

Adding to 672226420 its reverse (24622276), we get a palindrome (696848696).

The spelling of 672226420 in words is "six hundred seventy-two million, two hundred twenty-six thousand, four hundred twenty".