1247448464 has 20 divisors (see below), whose sum is σ = 2418600780. Its totient is φ = 623293440.

The previous prime is 1247448443. The next prime is 1247448467. The reversal of 1247448464 is 4648447421.

It can be written as a sum of positive squares in 2 ways, for example, as 161086864 + 1086361600 = 12692^2 + 32960^2 .

It is a super-2 number, since 2×1247448464² = 3112255340671918592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1247448467) 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 3 ways as a sum of consecutive naturals, for example, 2357 + ... + 50004.

It is an arithmetic number, because the mean of its divisors is an integer number (120930039).

Almost surely, 2^1247448464 is an apocalyptic number.

It is an amenable number.

1247448464 is a deficient number, since it is larger than the sum of its proper divisors (1171152316).

1247448464 is a wasteful number, since it uses less digits than its factorization.

1247448464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53858 (or 53852 counting only the distinct ones).

The product of its digits is 688128, while the sum is 44.

The square root of 1247448464 is about 35319.2364583381. The cubic root of 1247448464 is about 1076.4838967212.

The spelling of 1247448464 in words is "one billion, two hundred forty-seven million, four hundred forty-eight thousand, four hundred sixty-four".