1311858428 has 6 divisors (see below), whose sum is σ = 2295752256. Its totient is φ = 655929212.

The previous prime is 1311858389. The next prime is 1311858467. The reversal of 1311858428 is 8248581131.

It is an interprime number because it is at equal distance from previous prime (1311858389) and next prime (1311858467).

It is a super-2 number, since 2×1311858428² = 3441945070229262368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163982300 + ... + 163982307.

It is an arithmetic number, because the mean of its divisors is an integer number (382625376).

Almost surely, 2^1311858428 is an apocalyptic number.

It is an amenable number.

1311858428 is a deficient number, since it is larger than the sum of its proper divisors (983893828).

1311858428 is a wasteful number, since it uses less digits than its factorization.

1311858428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327964611 (or 327964609 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 1311858428 is about 36219.5862483270. The cubic root of 1311858428 is about 1094.7013573656.

The spelling of 1311858428 in words is "one billion, three hundred eleven million, eight hundred fifty-eight thousand, four hundred twenty-eight".