72101838 has 8 divisors (see below), whose sum is σ = 144203688. Its totient is φ = 24033944.

The previous prime is 72101831. The next prime is 72101839. The reversal of 72101838 is 83810127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

72101838 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72101831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6008481 + ... + 6008492.

It is an arithmetic number, because the mean of its divisors is an integer number (18025461).

Almost surely, 2^72101838 is an apocalyptic number.

72101838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72101838 is a wasteful number, since it uses less digits than its factorization.

72101838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12016978.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 72101838 is about 8491.2801155067. The cubic root of 72101838 is about 416.2128125567.

The spelling of 72101838 in words is "seventy-two million, one hundred one thousand, eight hundred thirty-eight".