72203738 has 8 divisors (see below), whose sum is σ = 108424980. Its totient is φ = 36062080.

The previous prime is 72203731. The next prime is 72203741. The reversal of 72203738 is 83730227.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71351809 + 851929 = 8447^2 + 923^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72203731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17573 + ... + 21288.

Almost surely, 2^72203738 is an apocalyptic number.

72203738 is a deficient number, since it is larger than the sum of its proper divisors (36221242).

72203738 is a wasteful number, since it uses less digits than its factorization.

72203738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39792.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 72203738 is about 8497.2782701286. The cubic root of 72203738 is about 416.4087951762.

The spelling of 72203738 in words is "seventy-two million, two hundred three thousand, seven hundred thirty-eight".