6990438 has 96 divisors (see below), whose sum is σ = 18385920. Its totient is φ = 1753920.

The previous prime is 6990427. The next prime is 6990439. The reversal of 6990438 is 8340996.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 6990396 and 6990405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118453 + ... + 118511.

It is an arithmetic number, because the mean of its divisors is an integer number (191520).

Almost surely, 2^6990438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6990438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9192960).

6990438 is an abundant number, since it is smaller than the sum of its proper divisors (11395482).

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

6990438 is a wasteful number, since it uses less digits than its factorization.

6990438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 6990438 is about 2643.9436453903. The cubic root of 6990438 is about 191.2059764534.

It can be divided in two parts, 6 and 990438, that multiplied together give a triangular number (5942628 = T₃₄₄₇).

The spelling of 6990438 in words is "six million, nine hundred ninety thousand, four hundred thirty-eight".