100720038 has 16 divisors (see below), whose sum is σ = 202648320. Its totient is φ = 33371976.

The previous prime is 100720027. The next prime is 100720049. The reversal of 100720038 is 830027001.

It is an interprime number because it is at equal distance from previous prime (100720027) and next prime (100720049).

It is a junction number, because it is equal to n+sod(n) for n = 100719996 and 100720023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49258 + ... + 51261.

It is an arithmetic number, because the mean of its divisors is an integer number (12665520).

Almost surely, 2^100720038 is an apocalyptic number.

100720038 is an abundant number, since it is smaller than the sum of its proper divisors (101928282).

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

100720038 is a wasteful number, since it uses less digits than its factorization.

100720038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100691.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 100720038 is about 10035.9373254320. The cubic root of 100720038 is about 465.2702602823.

Adding to 100720038 its reverse (830027001), we get a palindrome (930747039).

The spelling of 100720038 in words is "one hundred million, seven hundred twenty thousand, thirty-eight".