1396471752 has 160 divisors (see below), whose sum is σ = 4258207800. Its totient is φ = 425005056.

The previous prime is 1396471691. The next prime is 1396471777. The reversal of 1396471752 is 2571746931.

It can be written as a sum of positive squares in 4 ways, for example, as 702992196 + 693479556 = 26514^2 + 26334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1396471698 and 1396471707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 816274 + ... + 817982.

Almost surely, 2^1396471752 is an apocalyptic number.

1396471752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1396471752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2129103900).

1396471752 is an abundant number, since it is smaller than the sum of its proper divisors (2861736048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1396471752 is a wasteful number, since it uses less digits than its factorization.

1396471752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837 (or 1824 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 1396471752 is about 37369.3959276839. The cubic root of 1396471752 is about 1117.7483867491.

The spelling of 1396471752 in words is "one billion, three hundred ninety-six million, four hundred seventy-one thousand, seven hundred fifty-two".