7913351428 has 6 divisors (see below), whose sum is σ = 13848365006. Its totient is φ = 3956675712.

The previous prime is 7913351399. The next prime is 7913351443. The reversal of 7913351428 is 8241533197.

It can be written as a sum of positive squares in only one way, i.e., 4548423364 + 3364928064 = 67442^2 + 58008^2 .

It is a super-2 number, since 2×7913351428² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989168925 + ... + 989168932.

Almost surely, 2^7913351428 is an apocalyptic number.

It is an amenable number.

7913351428 is a deficient number, since it is larger than the sum of its proper divisors (5935013578).

7913351428 is a wasteful number, since it uses less digits than its factorization.

7913351428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978337861 (or 1978337859 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 7913351428 is about 88957.0201164585. The cubic root of 7913351428 is about 1992.7530583010.

The spelling of 7913351428 in words is "seven billion, nine hundred thirteen million, three hundred fifty-one thousand, four hundred twenty-eight".