7930405 has 12 divisors (see below), whose sum is σ = 11070540. Its totient is φ = 5437824.

The previous prime is 7930399. The next prime is 7930409. The reversal of 7930405 is 5040397.

It can be written as a sum of positive squares in 2 ways, for example, as 1366561 + 6563844 = 1169^2 + 2562^2 .

It is not a de Polignac number, because 7930405 - 2³ = 7930397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7930409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15940 + ... + 16429.

It is an arithmetic number, because the mean of its divisors is an integer number (922545).

Almost surely, 2^7930405 is an apocalyptic number.

It is an amenable number.

7930405 is a deficient number, since it is larger than the sum of its proper divisors (3140135).

7930405 is a wasteful number, since it uses less digits than its factorization.

7930405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32388 (or 32381 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 7930405 is about 2816.0974770061. The cubic root of 7930405 is about 199.4183517330.

The spelling of 7930405 in words is "seven million, nine hundred thirty thousand, four hundred five".