72707438 has 8 divisors (see below), whose sum is σ = 109258632. Its totient is φ = 36287896.

The previous prime is 72707423. The next prime is 72707443. The reversal of 72707438 is 83470727.

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

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31520 + ... + 33747.

It is an arithmetic number, because the mean of its divisors is an integer number (13657329).

Almost surely, 2^72707438 is an apocalyptic number.

72707438 is a deficient number, since it is larger than the sum of its proper divisors (36551194).

72707438 is a wasteful number, since it uses less digits than its factorization.

72707438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65826.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 72707438 is about 8526.8656609566. The cubic root of 72707438 is about 417.3748543842.

The spelling of 72707438 in words is "seventy-two million, seven hundred seven thousand, four hundred thirty-eight".