7865442 has 24 divisors (see below), whose sum is σ = 18353244. Its totient is φ = 2420064.

The previous prime is 7865393. The next prime is 7865443. The reversal of 7865442 is 2445687.

It can be written as a sum of positive squares in 2 ways, for example, as 7017201 + 848241 = 2649^2 + 921^2 .

It is a d-powerful number, because it can be written as 7⁸ + 8 + 6² + 5⁵ + 4³ + 4⁴ + 2²¹ .

It is a junction number, because it is equal to n+sod(n) for n = 7865397 and 7865406.

It is not an unprimeable number, because it can be changed into a prime (7865443) 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, 16573 + ... + 17040.

Almost surely, 2^7865442 is an apocalyptic number.

7865442 is an abundant number, since it is smaller than the sum of its proper divisors (10487802).

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

7865442 is a wasteful number, since it uses less digits than its factorization.

7865442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33634 (or 33631 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 7865442 is about 2804.5395343978. The cubic root of 7865442 is about 198.8723371657.

The spelling of 7865442 in words is "seven million, eight hundred sixty-five thousand, four hundred forty-two".