6990100 has 72 divisors (see below), whose sum is σ = 17255840. Its totient is φ = 2436480.

The previous prime is 6990059. The next prime is 6990107. The reversal of 6990100 is 10996.

It is a super-2 number, since 2×6990100² = 97722996020000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24559 + ... + 24841.

Almost surely, 2^6990100 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 6990100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8627920).

6990100 is an abundant number, since it is smaller than the sum of its proper divisors (10265740).

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

6990100 is a wasteful number, since it uses less digits than its factorization.

6990100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 6990100 is about 2643.8797249497. The cubic root of 6990100 is about 191.2028946884.

The spelling of 6990100 in words is "six million, nine hundred ninety thousand, one hundred".