1393427780 has 48 divisors (see below), whose sum is σ = 3150887040. Its totient is φ = 515685888.

The previous prime is 1393427779. The next prime is 1393427809. The reversal of 1393427780 is 877243931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14672 + ... + 54791.

It is an arithmetic number, because the mean of its divisors is an integer number (65643480).

Almost surely, 2^1393427780 is an apocalyptic number.

1393427780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1393427780 is an abundant number, since it is smaller than the sum of its proper divisors (1757459260).

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

1393427780 is a wasteful number, since it uses less digits than its factorization.

1393427780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69548 (or 69546 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 1393427780 is about 37328.6455687854. The cubic root of 1393427780 is about 1116.9356552064.

It can be divided in two parts, 13934 and 27780, that added together give a palindrome (41714).

The spelling of 1393427780 in words is "one billion, three hundred ninety-three million, four hundred twenty-seven thousand, seven hundred eighty".