1380685090 has 16 divisors (see below), whose sum is σ = 2631423672. Its totient is φ = 519787264.

The previous prime is 1380685069. The next prime is 1380685121. The reversal of 1380685090 is 905860831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1142507601 + 238177489 = 33801^2 + 15433^2 .

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, 4060669 + ... + 4061008.

Almost surely, 2^1380685090 is an apocalyptic number.

1380685090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1380685090 is a deficient number, since it is larger than the sum of its proper divisors (1250738582).

1380685090 is a wasteful number, since it uses less digits than its factorization.

1380685090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121701.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1380685090 is about 37157.5710993063. The cubic root of 1380685090 is about 1113.5204866828.

The spelling of 1380685090 in words is "one billion, three hundred eighty million, six hundred eighty-five thousand, ninety".