1380640290 has 16 divisors (see below), whose sum is σ = 3313536768. Its totient is φ = 368170736.

The previous prime is 1380640279. The next prime is 1380640333. The reversal of 1380640290 is 920460831.

It is a super-2 number, since 2×1380640290² = 3812335220742568200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 23010642 + ... + 23010701.

It is an arithmetic number, because the mean of its divisors is an integer number (207096048).

Almost surely, 2^1380640290 is an apocalyptic number.

1380640290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1380640290 is an abundant number, since it is smaller than the sum of its proper divisors (1932896478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1380640290 is a wasteful number, since it uses less digits than its factorization.

1380640290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46021353.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1380640290 is about 37156.9682563042. The cubic root of 1380640290 is about 1113.5084428412.

The spelling of 1380640290 in words is "one billion, three hundred eighty million, six hundred forty thousand, two hundred ninety".