7428938357 has 4 divisors (see below), whose sum is σ = 7429760556. Its totient is φ = 7428116160.

The previous prime is 7428938347. The next prime is 7428938369. The reversal of 7428938357 is 7538398247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1339633201 + 6089305156 = 36601^2 + 78034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7428938357 is a prime.

It is a super-2 number, since 2×7428938357² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7428938347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397394 + ... + 415667.

It is an arithmetic number, because the mean of its divisors is an integer number (1857440139).

Almost surely, 2^7428938357 is an apocalyptic number.

It is an amenable number.

7428938357 is a deficient number, since it is larger than the sum of its proper divisors (822199).

7428938357 is an equidigital number, since it uses as much as digits as its factorization.

7428938357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822198.

The product of its digits is 10160640, while the sum is 56.

The square root of 7428938357 is about 86191.2893336676. The cubic root of 7428938357 is about 1951.2320381599.

The spelling of 7428938357 in words is "seven billion, four hundred twenty-eight million, nine hundred thirty-eight thousand, three hundred fifty-seven".