1385267478 has 64 divisors (see below), whose sum is σ = 3222847488. Its totient is φ = 388761120.

The previous prime is 1385267473. The next prime is 1385267501. The reversal of 1385267478 is 8747625831.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385267478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385267473) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1707693 + ... + 1708503.

It is an arithmetic number, because the mean of its divisors is an integer number (50356992).

Almost surely, 2^1385267478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385267478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1611423744).

1385267478 is an abundant number, since it is smaller than the sum of its proper divisors (1837580010).

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

1385267478 is a wasteful number, since it uses less digits than its factorization.

1385267478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497.

The product of its digits is 2257920, while the sum is 51.

The square root of 1385267478 is about 37219.1815869183. The cubic root of 1385267478 is about 1114.7510227191.

The spelling of 1385267478 in words is "one billion, three hundred eighty-five million, two hundred sixty-seven thousand, four hundred seventy-eight".