2390842 has 4 divisors (see below), whose sum is σ = 3586266. Its totient is φ = 1195420.

The previous prime is 2390831. The next prime is 2390849. The reversal of 2390842 is 2480932.

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

It can be written as a sum of positive squares in only one way, i.e., 2187441 + 203401 = 1479^2 + 451^2 .

It is a super-2 number, since 2×2390842² = 11432250937928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2390842.

It is not an unprimeable number, because it can be changed into a prime (2390849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597709 + ... + 597712.

2^2390842 is an apocalyptic number.

2390842 is a deficient number, since it is larger than the sum of its proper divisors (1195424).

2390842 is a wasteful number, since it uses less digits than its factorization.

2390842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195423.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2390842 is about 1546.2347816551. The cubic root of 2390842 is about 133.7160766443.

It can be divided in two parts, 239084 and 2, that added together give a triangular number (239086 = T₆₉₁).

The spelling of 2390842 in words is "two million, three hundred ninety thousand, eight hundred forty-two".