6442992 has 60 divisors (see below), whose sum is σ = 18251064. Its totient is φ = 2121600.

The previous prime is 6442981. The next prime is 6442993. The reversal of 6442992 is 2992446.

6442992 is a `hidden beast` number, since 644 + 2 + 9 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442993) 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, 14323 + ... + 14765.

Almost surely, 2^6442992 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 6442992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9125532).

6442992 is an abundant number, since it is smaller than the sum of its proper divisors (11808072).

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

6442992 is a wasteful number, since it uses less digits than its factorization.

6442992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 549 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 6442992 is about 2538.3049462190. The cubic root of 6442992 is about 186.0783575505.

The spelling of 6442992 in words is "six million, four hundred forty-two thousand, nine hundred ninety-two".