1388640210 has 32 divisors (see below), whose sum is σ = 3334174272. Its totient is φ = 370144320.

The previous prime is 1388640103. The next prime is 1388640233. The reversal of 1388640210 is 120468831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71665 + ... + 88955.

It is an arithmetic number, because the mean of its divisors is an integer number (104192946).

Almost surely, 2^1388640210 is an apocalyptic number.

1388640210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388640210 is an abundant number, since it is smaller than the sum of its proper divisors (1945534062).

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

1388640210 is a wasteful number, since it uses less digits than its factorization.

1388640210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19978.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1388640210 is about 37264.4630982388. The cubic root of 1388640210 is about 1115.6549899587.

The spelling of 1388640210 in words is "one billion, three hundred eighty-eight million, six hundred forty thousand, two hundred ten".