672561338 has 8 divisors (see below), whose sum is σ = 1009748532. Its totient is φ = 335978496.

The previous prime is 672561313. The next prime is 672561353. The reversal of 672561338 is 833165276.

It can be written as a sum of positive squares in 2 ways, for example, as 572501329 + 100060009 = 23927^2 + 10003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 672561295 and 672561304.

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, 148295 + ... + 152762.

Almost surely, 2^672561338 is an apocalyptic number.

672561338 is a deficient number, since it is larger than the sum of its proper divisors (337187194).

672561338 is a wasteful number, since it uses less digits than its factorization.

672561338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302176.

The product of its digits is 181440, while the sum is 41.

The square root of 672561338 is about 25933.7875752849. The cubic root of 672561338 is about 876.1476480485.

The spelling of 672561338 in words is "six hundred seventy-two million, five hundred sixty-one thousand, three hundred thirty-eight".