4640278 has 4 divisors (see below), whose sum is σ = 6960420. Its totient is φ = 2320138.

The previous prime is 4640267. The next prime is 4640287. The reversal of 4640278 is 8720464.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160068 + ... + 1160071.

It is an arithmetic number, because the mean of its divisors is an integer number (1740105).

Almost surely, 2^4640278 is an apocalyptic number.

4640278 is a deficient number, since it is larger than the sum of its proper divisors (2320142).

4640278 is a wasteful number, since it uses less digits than its factorization.

4640278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320141.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 4640278 is about 2154.1304510173. The cubic root of 4640278 is about 166.7943492691.

The spelling of 4640278 in words is "four million, six hundred forty thousand, two hundred seventy-eight".