101002040 has 32 divisors (see below), whose sum is σ = 227648880. Its totient is φ = 40330752.

The previous prime is 101002037. The next prime is 101002051. The reversal of 101002040 is 40200101.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25472 + ... + 29168.

Almost surely, 2^101002040 is an apocalyptic number.

101002040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101002040 is an abundant number, since it is smaller than the sum of its proper divisors (126646840).

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

101002040 is a wasteful number, since it uses less digits than its factorization.

101002040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391 (or 4387 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 101002040 is about 10049.9771144018. The cubic root of 101002040 is about 465.7040861716.

Adding to 101002040 its reverse (40200101), we get a palindrome (141202141).

The spelling of 101002040 in words is "one hundred one million, two thousand, forty".