672478 has 4 divisors (see below), whose sum is σ = 1008720. Its totient is φ = 336238.

The previous prime is 672473. The next prime is 672493. The reversal of 672478 is 874276.

672478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672473) by changing a digit.

672478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168118 + ... + 168121.

It is an arithmetic number, because the mean of its divisors is an integer number (252180).

2⁶⁷²⁴⁷⁸ is an apocalyptic number.

672478 is a deficient number, since it is larger than the sum of its proper divisors (336242).

672478 is a wasteful number, since it uses less digits than its factorization.

672478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336241.

The product of its digits is 18816, while the sum is 34.

The square root of 672478 is about 820.0475595964. The cubic root of 672478 is about 87.6111458334.

The spelling of 672478 in words is "six hundred seventy-two thousand, four hundred seventy-eight".