2278742 has 8 divisors (see below), whose sum is σ = 3497736. Its totient is φ = 1112832.

The previous prime is 2278729. The next prime is 2278747. The reversal of 2278742 is 2478722.

It is a happy number.

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

It is a d-powerful number, because it can be written as 2⁹ + 2¹⁷ + 7⁵ + 8 + 7⁵ + 4⁷ + 2²¹ .

It is a junction number, because it is equal to n+sod(n) for n = 2278699 and 2278708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13163 + ... + 13334.

It is an arithmetic number, because the mean of its divisors is an integer number (437217).

2^2278742 is an apocalyptic number.

2278742 is a deficient number, since it is larger than the sum of its proper divisors (1218994).

2278742 is a wasteful number, since it uses less digits than its factorization.

2278742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26542.

The product of its digits is 12544, while the sum is 32.

The square root of 2278742 is about 1509.5502641515. The cubic root of 2278742 is about 131.5926761198.

The spelling of 2278742 in words is "two million, two hundred seventy-eight thousand, seven hundred forty-two".