1391734436 has 6 divisors (see below), whose sum is σ = 2435535270. Its totient is φ = 695867216.

The previous prime is 1391734433. The next prime is 1391734441. The reversal of 1391734436 is 6344371931.

It can be written as a sum of positive squares in only one way, i.e., 1388009536 + 3724900 = 37256^2 + 1930^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1391734393 and 1391734402.

It is not an unprimeable number, because it can be changed into a prime (1391734433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173966801 + ... + 173966808.

It is an arithmetic number, because the mean of its divisors is an integer number (405922545).

Almost surely, 2^1391734436 is an apocalyptic number.

It is an amenable number.

1391734436 is a deficient number, since it is larger than the sum of its proper divisors (1043800834).

1391734436 is a wasteful number, since it uses less digits than its factorization.

1391734436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347933613 (or 347933611 counting only the distinct ones).

The product of its digits is 163296, while the sum is 41.

The square root of 1391734436 is about 37305.9571114319. The cubic root of 1391734436 is about 1116.4830248935.

The spelling of 1391734436 in words is "one billion, three hundred ninety-one million, seven hundred thirty-four thousand, four hundred thirty-six".