7705040 has 40 divisors (see below), whose sum is σ = 20474880. Its totient is φ = 2641536.

The previous prime is 7705037. The next prime is 7705043. The reversal of 7705040 is 405077.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7705037) and next prime (7705043).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 7704997 and 7705015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7705043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6320 + ... + 7439.

It is an arithmetic number, because the mean of its divisors is an integer number (511872).

Almost surely, 2^7705040 is an apocalyptic number.

7705040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7705040 is an abundant number, since it is smaller than the sum of its proper divisors (12769840).

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

7705040 is a wasteful number, since it uses less digits than its factorization.

7705040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13779 (or 13773 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 7705040 is about 2775.7953815078. The cubic root of 7705040 is about 197.5111567697.

The spelling of 7705040 in words is "seven million, seven hundred five thousand, forty".