672389641 has 64 divisors (see below), whose sum is σ = 903799296. Its totient is φ = 485222400.

The previous prime is 672389629. The next prime is 672389657. The reversal of 672389641 is 146983276.

It is a 4-Lehmer number, since φ(672389641) divides (672389641-1)⁴.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 672389641 - 2⁵ = 672389609 is a prime.

It is a deceptive number, since it divides R_672389640.

It is a junction number, because it is equal to n+sod(n) for n = 672389591 and 672389600.

It is not an unprimeable number, because it can be changed into a prime (672389671) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9210781 + ... + 9210853.

It is an arithmetic number, because the mean of its divisors is an integer number (14121864).

It is a Poulet number, since it divides 2^672389640-1.

Almost surely, 2^672389641 is an apocalyptic number.

672389641 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

672389641 is a deficient number, since it is larger than the sum of its proper divisors (231409655).

672389641 is a wasteful number, since it uses less digits than its factorization.

672389641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242.

The product of its digits is 435456, while the sum is 46.

The square root of 672389641 is about 25930.4770684999. The cubic root of 672389641 is about 876.0730849728.

The spelling of 672389641 in words is "six hundred seventy-two million, three hundred eighty-nine thousand, six hundred forty-one".