7838040 has 192 divisors, whose sum is σ = 28892160. Its totient is φ = 1693440.

The previous prime is 7838029. The next prime is 7838041. The reversal of 7838040 is 408387.

It is a super-2 number, since 2×7838040² = 122869742083200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7837989 and 7838007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7838041) 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 in 47 ways as a sum of consecutive naturals, for example, 182259 + ... + 182301.

It is an arithmetic number, because the mean of its divisors is an integer number (150480).

Almost surely, 2^7838040 is an apocalyptic number.

7838040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7838040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14446080).

7838040 is an abundant number, since it is smaller than the sum of its proper divisors (21054120).

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

7838040 is a wasteful number, since it uses less digits than its factorization.

7838040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 7838040 is about 2799.6499781223. The cubic root of 7838040 is about 198.6411214896.

The spelling of 7838040 in words is "seven million, eight hundred thirty-eight thousand, forty".