1390219905 has 8 divisors (see below), whose sum is σ = 2224351872. Its totient is φ = 741450608.

The previous prime is 1390219879. The next prime is 1390219921. The reversal of 1390219905 is 5099120931.

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

It is a cyclic number.

It is not a de Polignac number, because 1390219905 - 2¹² = 1390215809 is a prime.

It is a super-2 number, since 2×1390219905² = 3865422768516418050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46340649 + ... + 46340678.

It is an arithmetic number, because the mean of its divisors is an integer number (278043984).

Almost surely, 2^1390219905 is an apocalyptic number.

1390219905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1390219905 is a deficient number, since it is larger than the sum of its proper divisors (834131967).

1390219905 is an equidigital number, since it uses as much as digits as its factorization.

1390219905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92681335.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 1390219905 is about 37285.6528037260. The cubic root of 1390219905 is about 1116.0778800945.

The spelling of 1390219905 in words is "one billion, three hundred ninety million, two hundred nineteen thousand, nine hundred five".