1385470655 has 4 divisors (see below), whose sum is σ = 1662564792. Its totient is φ = 1108376520.

The previous prime is 1385470651. The next prime is 1385470663. The reversal of 1385470655 is 5560745831.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1385470655 - 2² = 1385470651 is a prime.

It is a super-2 number, since 2×1385470655² = 3839057871732258050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385470651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138547061 + ... + 138547070.

It is an arithmetic number, because the mean of its divisors is an integer number (415641198).

Almost surely, 2^1385470655 is an apocalyptic number.

1385470655 is a deficient number, since it is larger than the sum of its proper divisors (277094137).

1385470655 is an equidigital number, since it uses as much as digits as its factorization.

1385470655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277094136.

The product of its (nonzero) digits is 504000, while the sum is 44.

The square root of 1385470655 is about 37221.9109530932. The cubic root of 1385470655 is about 1114.8055201838.

The spelling of 1385470655 in words is "one billion, three hundred eighty-five million, four hundred seventy thousand, six hundred fifty-five".