6906780 has 36 divisors (see below), whose sum is σ = 20951112. Its totient is φ = 1841760.

The previous prime is 6906763. The next prime is 6906793. The reversal of 6906780 is 876096.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19006 + ... + 19365.

Almost surely, 2^6906780 is an apocalyptic number.

6906780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6906780 is an abundant number, since it is smaller than the sum of its proper divisors (14044332).

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

6906780 is a wasteful number, since it uses less digits than its factorization.

6906780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38386 (or 38381 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 6906780 is about 2628.0753413858. The cubic root of 6906780 is about 190.4401614196.

The spelling of 6906780 in words is "six million, nine hundred six thousand, seven hundred eighty".