72144406 has 12 divisors (see below), whose sum is σ = 114213132. Its totient is φ = 34173324.

The previous prime is 72144403. The next prime is 72144419. The reversal of 72144406 is 60444127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72144403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49240 + ... + 50683.

It is an arithmetic number, because the mean of its divisors is an integer number (9517761).

Almost surely, 2^72144406 is an apocalyptic number.

72144406 is a deficient number, since it is larger than the sum of its proper divisors (42068726).

72144406 is a wasteful number, since it uses less digits than its factorization.

72144406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99963 (or 99944 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 72144406 is about 8493.7863170673. The cubic root of 72144406 is about 416.2947053440.

The spelling of 72144406 in words is "seventy-two million, one hundred forty-four thousand, four hundred six".