6905405790 has 64 divisors (see below), whose sum is σ = 19383609600. Its totient is φ = 1744522272.

The previous prime is 6905405783. The next prime is 6905405791. The reversal of 6905405790 is 975045096.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6905405791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 667912 + ... + 678171.

It is an arithmetic number, because the mean of its divisors is an integer number (302868900).

Almost surely, 2^6905405790 is an apocalyptic number.

6905405790 is an abundant number, since it is smaller than the sum of its proper divisors (12478203810).

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

6905405790 is a wasteful number, since it uses less digits than its factorization.

6905405790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346118 (or 1346112 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 6905405790 is about 83098.7712905552. The cubic root of 6905405790 is about 1904.2753024977.

The spelling of 6905405790 in words is "six billion, nine hundred five million, four hundred five thousand, seven hundred ninety".