1387770189 has 32 divisors (see below), whose sum is σ = 2033144064. Its totient is φ = 836828160.

The previous prime is 1387770157. The next prime is 1387770229. The reversal of 1387770189 is 9810777831.

It is a happy number.

It is not a de Polignac number, because 1387770189 - 2⁵ = 1387770157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387770119) 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 31 ways as a sum of consecutive naturals, for example, 477589 + ... + 480485.

It is an arithmetic number, because the mean of its divisors is an integer number (63535752).

Almost surely, 2^1387770189 is an apocalyptic number.

It is an amenable number.

1387770189 is a deficient number, since it is larger than the sum of its proper divisors (645373875).

1387770189 is a wasteful number, since it uses less digits than its factorization.

1387770189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157.

The product of its (nonzero) digits is 592704, while the sum is 51.

The square root of 1387770189 is about 37252.7876675021. The cubic root of 1387770189 is about 1115.4219451798.

The spelling of 1387770189 in words is "one billion, three hundred eighty-seven million, seven hundred seventy thousand, one hundred eighty-nine".