1397638110 has 64 divisors (see below), whose sum is σ = 3664673280. Its totient is φ = 338321280.

The previous prime is 1397638091. The next prime is 1397638117. The reversal of 1397638110 is 118367931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397638117) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 252351 + ... + 257829.

It is an arithmetic number, because the mean of its divisors is an integer number (57260520).

Almost surely, 2^1397638110 is an apocalyptic number.

1397638110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397638110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1832336640).

1397638110 is an abundant number, since it is smaller than the sum of its proper divisors (2267035170).

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

1397638110 is a wasteful number, since it uses less digits than its factorization.

1397638110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1397638110 is about 37384.9984619499. The cubic root of 1397638110 is about 1118.0594879184.

The spelling of 1397638110 in words is "one billion, three hundred ninety-seven million, six hundred thirty-eight thousand, one hundred ten".