1387945010 has 16 divisors (see below), whose sum is σ = 2498779800. Its totient is φ = 555071616.

The previous prime is 1387945001. The next prime is 1387945037. The reversal of 1387945010 is 105497831.

It can be written as a sum of positive squares in 4 ways, for example, as 1109755969 + 278189041 = 33313^2 + 16679^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61556 + ... + 81024.

Almost surely, 2^1387945010 is an apocalyptic number.

1387945010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1387945010 is a deficient number, since it is larger than the sum of its proper divisors (1110834790).

1387945010 is a wasteful number, since it uses less digits than its factorization.

1387945010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26605.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1387945010 is about 37255.1340086169. The cubic root of 1387945010 is about 1115.4687807423.

The spelling of 1387945010 in words is "one billion, three hundred eighty-seven million, nine hundred forty-five thousand, ten".