72106554 has 96 divisors (see below), whose sum is σ = 170760960. Its totient is φ = 20207616.

The previous prime is 72106549. The next prime is 72106579. The reversal of 72106554 is 45560127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 810142 + ... + 810230.

It is an arithmetic number, because the mean of its divisors is an integer number (1778760).

Almost surely, 2^72106554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72106554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85380480).

72106554 is an abundant number, since it is smaller than the sum of its proper divisors (98654406).

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

72106554 is a wasteful number, since it uses less digits than its factorization.

72106554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 72106554 is about 8491.5578076110. The cubic root of 72106554 is about 416.2218868369.

The spelling of 72106554 in words is "seventy-two million, one hundred six thousand, five hundred fifty-four".