4278646 has 4 divisors (see below), whose sum is σ = 6417972. Its totient is φ = 2139322.

The previous prime is 4278641. The next prime is 4278649. The reversal of 4278646 is 6468724.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069660 + ... + 1069663.

It is an arithmetic number, because the mean of its divisors is an integer number (1604493).

Almost surely, 2^4278646 is an apocalyptic number.

4278646 is a deficient number, since it is larger than the sum of its proper divisors (2139326).

4278646 is a wasteful number, since it uses less digits than its factorization.

4278646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139325.

The product of its digits is 64512, while the sum is 37.

The square root of 4278646 is about 2068.4888203710. The cubic root of 4278646 is about 162.3437045527.

The spelling of 4278646 in words is "four million, two hundred seventy-eight thousand, six hundred forty-six".