2780942 has 4 divisors (see below), whose sum is σ = 4171416. Its totient is φ = 1390470.

The previous prime is 2780933. The next prime is 2780951. The reversal of 2780942 is 2490872.

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

It is an interprime number because it is at equal distance from previous prime (2780933) and next prime (2780951).

It is a junction number, because it is equal to n+sod(n) for n = 2780899 and 2780908.

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, 695234 + ... + 695237.

It is an arithmetic number, because the mean of its divisors is an integer number (1042854).

2^2780942 is an apocalyptic number.

2780942 is a deficient number, since it is larger than the sum of its proper divisors (1390474).

2780942 is a wasteful number, since it uses less digits than its factorization.

2780942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390473.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2780942 is about 1667.6156631550. The cubic root of 2780942 is about 140.6254667968.

The spelling of 2780942 in words is "two million, seven hundred eighty thousand, nine hundred forty-two".