1391849472 has 104 divisors (see below), whose sum is σ = 3997076944. Its totient is φ = 428212224.

The previous prime is 1391849453. The next prime is 1391849479. The reversal of 1391849472 is 2749481931.

It is a tau number, because it is divible by the number of its divisors (104).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391849479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155388 + ... + 164100.

Almost surely, 2^1391849472 is an apocalyptic number.

1391849472 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 1391849472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998538472).

1391849472 is an abundant number, since it is smaller than the sum of its proper divisors (2605227472).

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

1391849472 is an equidigital number, since it uses as much as digits as its factorization.

1391849472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8753 (or 8731 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 1391849472 is about 37307.4988708705. The cubic root of 1391849472 is about 1116.5137855998.

The spelling of 1391849472 in words is "one billion, three hundred ninety-one million, eight hundred forty-nine thousand, four hundred seventy-two".