6940090 has 16 divisors (see below), whose sum is σ = 12830472. Its totient is φ = 2700864.

The previous prime is 6940069. The next prime is 6940091. The reversal of 6940090 is 900496.

It can be written as a sum of positive squares in 4 ways, for example, as 6702921 + 237169 = 2589^2 + 487^2 .

It is not an unprimeable number, because it can be changed into a prime (6940091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9009 + ... + 9748.

Almost surely, 2^6940090 is an apocalyptic number.

6940090 is a deficient number, since it is larger than the sum of its proper divisors (5890382).

6940090 is a wasteful number, since it uses less digits than its factorization.

6940090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18801.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 6940090 is about 2634.4050561749. The cubic root of 6940090 is about 190.7458219980.

The spelling of 6940090 in words is "six million, nine hundred forty thousand, ninety".