7825438 has 4 divisors (see below), whose sum is σ = 11738160. Its totient is φ = 3912718.

The previous prime is 7825429. The next prime is 7825439. The reversal of 7825438 is 8345287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8345287 = 73 ⋅114319.

It is a super-2 number, since 2×7825438² = 122474959783688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7825397 and 7825406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7825439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1956358 + ... + 1956361.

It is an arithmetic number, because the mean of its divisors is an integer number (2934540).

Almost surely, 2^7825438 is an apocalyptic number.

7825438 is a deficient number, since it is larger than the sum of its proper divisors (3912722).

7825438 is a wasteful number, since it uses less digits than its factorization.

7825438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912721.

The product of its digits is 53760, while the sum is 37.

The square root of 7825438 is about 2797.3984342599. The cubic root of 7825438 is about 198.5346059916.

The spelling of 7825438 in words is "seven million, eight hundred twenty-five thousand, four hundred thirty-eight".