7428438 has 24 divisors (see below), whose sum is σ = 16216200. Its totient is φ = 2457504.

The previous prime is 7428433. The next prime is 7428457. The reversal of 7428438 is 8348247.

It is a super-2 number, since 2×7428438² = 110363382239688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7428431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1018 + ... + 3986.

It is an arithmetic number, because the mean of its divisors is an integer number (675675).

Almost surely, 2^7428438 is an apocalyptic number.

7428438 is an abundant number, since it is smaller than the sum of its proper divisors (8787762).

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

7428438 is a wasteful number, since it uses less digits than its factorization.

7428438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116 (or 3113 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 7428438 is about 2725.5160979161. The cubic root of 7428438 is about 195.1188230441.

It can be divided in two parts, 742 and 8438, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 7428438 in words is "seven million, four hundred twenty-eight thousand, four hundred thirty-eight".