72064402 has 4 divisors (see below), whose sum is σ = 108096606. Its totient is φ = 36032200.

The previous prime is 72064381. The next prime is 72064403. The reversal of 72064402 is 20446027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 51279921 + 20784481 = 7161^2 + 4559^2 .

It is not an unprimeable number, because it can be changed into a prime (72064403) 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 as a sum of consecutive naturals, namely, 18016099 + ... + 18016102.

Almost surely, 2^72064402 is an apocalyptic number.

72064402 is a deficient number, since it is larger than the sum of its proper divisors (36032204).

72064402 is a wasteful number, since it uses less digits than its factorization.

72064402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36032203.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 72064402 is about 8489.0754502478. The cubic root of 72064402 is about 416.1407661257.

The spelling of 72064402 in words is "seventy-two million, sixty-four thousand, four hundred two".