7428005906 has 8 divisors (see below), whose sum is σ = 11156425164. Its totient is φ = 3709197520.

The previous prime is 7428005881. The next prime is 7428005909. The reversal of 7428005906 is 6095008247.

It can be written as a sum of positive squares in 2 ways, for example, as 6757662025 + 670343881 = 82205^2 + 25891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7428005909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2400785 + ... + 2403876.

Almost surely, 2^7428005906 is an apocalyptic number.

7428005906 is a deficient number, since it is larger than the sum of its proper divisors (3728419258).

7428005906 is a wasteful number, since it uses less digits than its factorization.

7428005906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805436.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 7428005906 is about 86185.8799688209. The cubic root of 7428005906 is about 1951.1503977646.

The spelling of 7428005906 in words is "seven billion, four hundred twenty-eight million, five thousand, nine hundred six".