6442436 has 48 divisors (see below), whose sum is σ = 15146880. Its totient is φ = 2315520.

The previous prime is 6442433. The next prime is 6442459. The reversal of 6442436 is 6342446.

It is a happy number.

It is a super-2 number, since 2×6442436² = 83009963228192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6442399 and 6442408.

It is not an unprimeable number, because it can be changed into a prime (6442433) 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, 3200 + ... + 4808.

It is an arithmetic number, because the mean of its divisors is an integer number (315560).

Almost surely, 2^6442436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6442436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7573440).

6442436 is an abundant number, since it is smaller than the sum of its proper divisors (8704444).

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

6442436 is a wasteful number, since it uses less digits than its factorization.

6442436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1642 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 6442436 is about 2538.1954219484. The cubic root of 6442436 is about 186.0730048333.

It can be divided in two parts, 64 and 42436, that multiplied together give a square (2715904 = 1648²).

The spelling of 6442436 in words is "six million, four hundred forty-two thousand, four hundred thirty-six".