72478429 has 8 divisors (see below), whose sum is σ = 76871160. Its totient is φ = 68100096.

The previous prime is 72478421. The next prime is 72478459. The reversal of 72478429 is 92487427.

It can be written as a sum of positive squares in 4 ways, for example, as 1750329 + 70728100 = 1323^2 + 8410^2 .

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

It is not a de Polignac number, because 72478429 - 2³ = 72478421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72478421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7837 + ... + 14365.

It is an arithmetic number, because the mean of its divisors is an integer number (9608895).

Almost surely, 2^72478429 is an apocalyptic number.

It is an amenable number.

72478429 is a deficient number, since it is larger than the sum of its proper divisors (4392731).

72478429 is a wasteful number, since it uses less digits than its factorization.

72478429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7199.

The product of its digits is 225792, while the sum is 43.

The square root of 72478429 is about 8513.4263959936. The cubic root of 72478429 is about 416.9361870812.

The spelling of 72478429 in words is "seventy-two million, four hundred seventy-eight thousand, four hundred twenty-nine".