1390271290 has 8 divisors (see below), whose sum is σ = 2502488340. Its totient is φ = 556108512.

The previous prime is 1390271273. The next prime is 1390271299. The reversal of 1390271290 is 921720931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1351371121 + 38900169 = 36761^2 + 6237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1390271299) 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 3 ways as a sum of consecutive naturals, for example, 69513555 + ... + 69513574.

Almost surely, 2^1390271290 is an apocalyptic number.

1390271290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390271290 is a deficient number, since it is larger than the sum of its proper divisors (1112217050).

1390271290 is a wasteful number, since it uses less digits than its factorization.

1390271290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139027136.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1390271290 is about 37286.3418693762. The cubic root of 1390271290 is about 1116.0916306662.

The spelling of 1390271290 in words is "one billion, three hundred ninety million, two hundred seventy-one thousand, two hundred ninety".