72438471 has 12 divisors (see below), whose sum is σ = 119581072. Its totient is φ = 41393376.

The previous prime is 72438427. The next prime is 72438481. The reversal of 72438471 is 17483427.

It is a happy number.

It is not a de Polignac number, because 72438471 - 2¹¹ = 72436423 is a prime.

It is a super-3 number, since 3×72438471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72438481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 574846 + ... + 574971.

Almost surely, 2^72438471 is an apocalyptic number.

72438471 is a deficient number, since it is larger than the sum of its proper divisors (47142601).

72438471 is a wasteful number, since it uses less digits than its factorization.

72438471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149830 (or 1149827 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 72438471 is about 8511.0793087598. The cubic root of 72438471 is about 416.8595527919.

The spelling of 72438471 in words is "seventy-two million, four hundred thirty-eight thousand, four hundred seventy-one".