72225406 has 16 divisors (see below), whose sum is σ = 121382640. Its totient is φ = 31942080.

The previous prime is 72225343. The next prime is 72225407. The reversal of 72225406 is 60452227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72225407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43551 + ... + 45178.

It is an arithmetic number, because the mean of its divisors is an integer number (7586415).

Almost surely, 2^72225406 is an apocalyptic number.

72225406 is a deficient number, since it is larger than the sum of its proper divisors (49157234).

72225406 is a wasteful number, since it uses less digits than its factorization.

72225406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88779.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 72225406 is about 8498.5531709815. The cubic root of 72225406 is about 416.4504451130.

The spelling of 72225406 in words is "seventy-two million, two hundred twenty-five thousand, four hundred six".