1385857726 has 16 divisors (see below), whose sum is σ = 2306206080. Its totient is φ = 619257880.

The previous prime is 1385857703. The next prime is 1385857729. The reversal of 1385857726 is 6277585831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385857729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532546 + ... + 535141.

It is an arithmetic number, because the mean of its divisors is an integer number (144137880).

Almost surely, 2^1385857726 is an apocalyptic number.

1385857726 is a deficient number, since it is larger than the sum of its proper divisors (920348354).

1385857726 is a wasteful number, since it uses less digits than its factorization.

1385857726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067759.

The product of its digits is 2822400, while the sum is 52.

The square root of 1385857726 is about 37227.1100946609. The cubic root of 1385857726 is about 1114.9093281587.

The spelling of 1385857726 in words is "one billion, three hundred eighty-five million, eight hundred fifty-seven thousand, seven hundred twenty-six".