72871798 has 4 divisors (see below), whose sum is σ = 109307700. Its totient is φ = 36435898.

The previous prime is 72871787. The next prime is 72871811. The reversal of 72871798 is 89717827.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18217948 + ... + 18217951.

It is an arithmetic number, because the mean of its divisors is an integer number (27326925).

Almost surely, 2^72871798 is an apocalyptic number.

72871798 is a deficient number, since it is larger than the sum of its proper divisors (36435902).

72871798 is a wasteful number, since it uses less digits than its factorization.

72871798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36435901.

The product of its digits is 395136, while the sum is 49.

The square root of 72871798 is about 8536.4979939083. The cubic root of 72871798 is about 417.6891189049.

The spelling of 72871798 in words is "seventy-two million, eight hundred seventy-one thousand, seven hundred ninety-eight".