1399057772 has 96 divisors (see below), whose sum is σ = 3027927168. Its totient is φ = 552075264.

The previous prime is 1399057763. The next prime is 1399057783. The reversal of 1399057772 is 2777509931.

It is a self number, because there is not a number n which added to its sum of digits gives 1399057772.

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, 7248908 + ... + 7249100.

It is an arithmetic number, because the mean of its divisors is an integer number (31540908).

Almost surely, 2^1399057772 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 1399057772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513963584).

1399057772 is an abundant number, since it is smaller than the sum of its proper divisors (1628869396).

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

1399057772 is a wasteful number, since it uses less digits than its factorization.

1399057772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 833490, while the sum is 50.

The square root of 1399057772 is about 37403.9806972467. The cubic root of 1399057772 is about 1118.4379190812.

The spelling of 1399057772 in words is "one billion, three hundred ninety-nine million, fifty-seven thousand, seven hundred seventy-two".