7920438 has 32 divisors (see below), whose sum is σ = 16558080. Its totient is φ = 2522880.

The previous prime is 7920433. The next prime is 7920443. The reversal of 7920438 is 8340297.

It is an interprime number because it is at equal distance from previous prime (7920433) and next prime (7920443).

It is a super-2 number, since 2×7920438² = 125466676223688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7920399 and 7920408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17823 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (517440).

Almost surely, 2^7920438 is an apocalyptic number.

7920438 is an abundant number, since it is smaller than the sum of its proper divisors (8637642).

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

7920438 is a wasteful number, since it uses less digits than its factorization.

7920438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 7920438 is about 2814.3272730797. The cubic root of 7920438 is about 199.3347731527.

The spelling of 7920438 in words is "seven million, nine hundred twenty thousand, four hundred thirty-eight".