2143678 has 8 divisors (see below), whose sum is σ = 3236472. Its totient is φ = 1064856.

The previous prime is 2143667. The next prime is 2143711. The reversal of 2143678 is 8763412.

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

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3100 + ... + 3727.

It is an arithmetic number, because the mean of its divisors is an integer number (404559).

2^2143678 is an apocalyptic number.

2143678 is a deficient number, since it is larger than the sum of its proper divisors (1092794).

2143678 is a wasteful number, since it uses less digits than its factorization.

2143678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6986.

The product of its digits is 8064, while the sum is 31.

The square root of 2143678 is about 1464.1304586682. The cubic root of 2143678 is about 128.9396588974.

The spelling of 2143678 in words is "two million, one hundred forty-three thousand, six hundred seventy-eight".