72409446 has 24 divisors (see below), whose sum is σ = 159231384. Its totient is φ = 23775840.

The previous prime is 72409427. The next prime is 72409489. The reversal of 72409446 is 64490427.

It is a self number, because there is not a number n which added to its sum of digits gives 72409446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28815 + ... + 31226.

It is an arithmetic number, because the mean of its divisors is an integer number (6634641).

Almost surely, 2^72409446 is an apocalyptic number.

72409446 is an abundant number, since it is smaller than the sum of its proper divisors (86821938).

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

72409446 is a wasteful number, since it uses less digits than its factorization.

72409446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60116 (or 60113 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 72409446 is about 8509.3740075284. The cubic root of 72409446 is about 416.8038689141.

The spelling of 72409446 in words is "seventy-two million, four hundred nine thousand, four hundred forty-six".