672388505 has 8 divisors (see below), whose sum is σ = 854329032. Its totient is φ = 506268928.

The previous prime is 672388489. The next prime is 672388517. The reversal of 672388505 is 505883276.

It can be written as a sum of positive squares in 4 ways, for example, as 81072016 + 591316489 = 9004^2 + 24317^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 672388505 - 2⁴ = 672388489 is a prime.

It is a super-2 number, since 2×672388505² = 904212603312270050, which contains 22 as substring.

It is a Duffinian number.

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, 3955142 + ... + 3955311.

It is an arithmetic number, because the mean of its divisors is an integer number (106791129).

Almost surely, 2^672388505 is an apocalyptic number.

It is an amenable number.

672388505 is a deficient number, since it is larger than the sum of its proper divisors (181940527).

672388505 is a wasteful number, since it uses less digits than its factorization.

672388505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7910475.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 672388505 is about 25930.4551637645. The cubic root of 672388505 is about 876.0725915984.

The spelling of 672388505 in words is "six hundred seventy-two million, three hundred eighty-eight thousand, five hundred five".