1247788476 has 96 divisors (see below), whose sum is σ = 3572943360. Its totient is φ = 378088560.

The previous prime is 1247788459. The next prime is 1247788483. The reversal of 1247788476 is 6748877421.

1247788476 is a `hidden beast` number, since 1 + 24 + 77 + 88 + 476 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89745 + ... + 102711.

It is an arithmetic number, because the mean of its divisors is an integer number (37218160).

Almost surely, 2^1247788476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247788476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1786471680).

1247788476 is an abundant number, since it is smaller than the sum of its proper divisors (2325154884).

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

1247788476 is a wasteful number, since it uses less digits than its factorization.

1247788476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13003 (or 12983 counting only the distinct ones).

The product of its digits is 4214784, while the sum is 54.

The square root of 1247788476 is about 35324.0495413536. The cubic root of 1247788476 is about 1076.5816921289.

The spelling of 1247788476 in words is "one billion, two hundred forty-seven million, seven hundred eighty-eight thousand, four hundred seventy-six".