72402729 has 8 divisors (see below), whose sum is σ = 110328000. Its totient is φ = 41372976.

The previous prime is 72402713. The next prime is 72402739. The reversal of 72402729 is 92720427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72402729 - 2⁴ = 72402713 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72402729.

It is not an unprimeable number, because it can be changed into a prime (72402709) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1723854 + ... + 1723895.

It is an arithmetic number, because the mean of its divisors is an integer number (13791000).

Almost surely, 2^72402729 is an apocalyptic number.

It is an amenable number.

72402729 is a deficient number, since it is larger than the sum of its proper divisors (37925271).

72402729 is a wasteful number, since it uses less digits than its factorization.

72402729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447759.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 72402729 is about 8508.9793159932. The cubic root of 72402729 is about 416.7909803647.

The spelling of 72402729 in words is "seventy-two million, four hundred two thousand, seven hundred twenty-nine".