2644942 has 4 divisors (see below), whose sum is σ = 3967416. Its totient is φ = 1322470.

The previous prime is 2644927. The next prime is 2644981. The reversal of 2644942 is 2494462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2494462 = 2 ⋅1247231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661234 + ... + 661237.

It is an arithmetic number, because the mean of its divisors is an integer number (991854).

2^2644942 is an apocalyptic number.

2644942 is a deficient number, since it is larger than the sum of its proper divisors (1322474).

2644942 is a wasteful number, since it uses less digits than its factorization.

2644942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322473.

The product of its digits is 13824, while the sum is 31.

The square root of 2644942 is about 1626.3277652429. The cubic root of 2644942 is about 138.2946515287.

The spelling of 2644942 in words is "two million, six hundred forty-four thousand, nine hundred forty-two".