72038229 has 4 divisors (see below), whose sum is σ = 96050976. Its totient is φ = 48025484.

The previous prime is 72038221. The next prime is 72038237. The reversal of 72038229 is 92283027.

Added to its reverse (92283027) it gives a triangular number (164321256 = T₁₈₁₂₈).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92283027 = 3 ⋅30761009.

It is an interprime number because it is at equal distance from previous prime (72038221) and next prime (72038237).

It is a cyclic number.

It is not a de Polignac number, because 72038229 - 2³ = 72038221 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 72038229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72038221) 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, 12006369 + ... + 12006374.

It is an arithmetic number, because the mean of its divisors is an integer number (24012744).

Almost surely, 2^72038229 is an apocalyptic number.

It is an amenable number.

72038229 is a deficient number, since it is larger than the sum of its proper divisors (24012747).

72038229 is a wasteful number, since it uses less digits than its factorization.

72038229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24012746.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 72038229 is about 8487.5337407282. The cubic root of 72038229 is about 416.0903807722.

Adding to 72038229 its reverse (92283027), we get a triangular number (164321256 = T₁₈₁₂₈).

The spelling of 72038229 in words is "seventy-two million, thirty-eight thousand, two hundred twenty-nine".