101002638 has 16 divisors (see below), whose sum is σ = 220369536. Its totient is φ = 30606840.

The previous prime is 101002633. The next prime is 101002669. The reversal of 101002638 is 836200101.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101002633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765106 + ... + 765237.

It is an arithmetic number, because the mean of its divisors is an integer number (13773096).

Almost surely, 2^101002638 is an apocalyptic number.

101002638 is an abundant number, since it is smaller than the sum of its proper divisors (119366898).

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

101002638 is a wasteful number, since it uses less digits than its factorization.

101002638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530359.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 101002638 is about 10050.0068656693. The cubic root of 101002638 is about 465.7050052636.

Adding to 101002638 its reverse (836200101), we get a palindrome (937202739).

The spelling of 101002638 in words is "one hundred one million, two thousand, six hundred thirty-eight".