1390468989 has 64 divisors (see below), whose sum is σ = 2338560000. Its totient is φ = 715398912.

The previous prime is 1390468987. The next prime is 1390469029. The reversal of 1390468989 is 9898640931.

It is not a de Polignac number, because 1390468989 - 2¹ = 1390468987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390468987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2786262 + ... + 2786760.

It is an arithmetic number, because the mean of its divisors is an integer number (36540000).

Almost surely, 2^1390468989 is an apocalyptic number.

It is an amenable number.

1390468989 is a deficient number, since it is larger than the sum of its proper divisors (948091011).

1390468989 is a wasteful number, since it uses less digits than its factorization.

1390468989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754.

The product of its (nonzero) digits is 3359232, while the sum is 57.

The square root of 1390468989 is about 37288.9928665283. The cubic root of 1390468989 is about 1116.1445315503.

The spelling of 1390468989 in words is "one billion, three hundred ninety million, four hundred sixty-eight thousand, nine hundred eighty-nine".