1397044782 has 144 divisors (see below), whose sum is σ = 3674352240. Its totient is φ = 382040064.

The previous prime is 1397044763. The next prime is 1397044799. The reversal of 1397044782 is 2874407931.

1397044782 is a `hidden beast` number, since 139 + 70 + 447 + 8 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4936413 + ... + 4936695.

It is an arithmetic number, because the mean of its divisors is an integer number (25516335).

Almost surely, 2^1397044782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397044782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837176120).

1397044782 is an abundant number, since it is smaller than the sum of its proper divisors (2277307458).

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

1397044782 is a wasteful number, since it uses less digits than its factorization.

1397044782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1397044782 is about 37377.0622441090. The cubic root of 1397044782 is about 1117.9012519416.

The spelling of 1397044782 in words is "one billion, three hundred ninety-seven million, forty-four thousand, seven hundred eighty-two".