7423638 has 8 divisors (see below), whose sum is σ = 14847288. Its totient is φ = 2474544.

The previous prime is 7423631. The next prime is 7423673. The reversal of 7423638 is 8363247.

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

7423638 is an admirable number.

It is a super-2 number, since 2×7423638² = 110220802310088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7423599 and 7423608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7423631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618631 + ... + 618642.

It is an arithmetic number, because the mean of its divisors is an integer number (1855911).

Almost surely, 2^7423638 is an apocalyptic number.

7423638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7423638 is a wasteful number, since it uses less digits than its factorization.

7423638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237278.

The product of its digits is 24192, while the sum is 33.

The square root of 7423638 is about 2724.6353884511. The cubic root of 7423638 is about 195.0767876414.

It can be divided in two parts, 742363 and 8, that added together give a triangular number (742371 = T₁₂₁₈).

The spelling of 7423638 in words is "seven million, four hundred twenty-three thousand, six hundred thirty-eight".