72135446 has 4 divisors (see below), whose sum is σ = 108203172. Its totient is φ = 36067722.

The previous prime is 72135443. The next prime is 72135451. The reversal of 72135446 is 64453127.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72135443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18033860 + ... + 18033863.

It is an arithmetic number, because the mean of its divisors is an integer number (27050793).

Almost surely, 2^72135446 is an apocalyptic number.

72135446 is a deficient number, since it is larger than the sum of its proper divisors (36067726).

72135446 is a wasteful number, since it uses less digits than its factorization.

72135446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36067725.

The product of its digits is 20160, while the sum is 32.

The square root of 72135446 is about 8493.2588562930. The cubic root of 72135446 is about 416.2774706745.

The spelling of 72135446 in words is "seventy-two million, one hundred thirty-five thousand, four hundred forty-six".