72147236 has 24 divisors (see below), whose sum is σ = 144480000. Its totient is φ = 30880512.

The previous prime is 72147233. The next prime is 72147239. The reversal of 72147236 is 63274127.

It is an interprime number because it is at equal distance from previous prime (72147233) and next prime (72147239).

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

It is not an unprimeable number, because it can be changed into a prime (72147233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33941 + ... + 36003.

It is an arithmetic number, because the mean of its divisors is an integer number (6020000).

Almost surely, 2^72147236 is an apocalyptic number.

It is an amenable number.

72147236 is an abundant number, since it is smaller than the sum of its proper divisors (72332764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72147236 is a wasteful number, since it uses less digits than its factorization.

72147236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323 (or 3321 counting only the distinct ones).

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

The square root of 72147236 is about 8493.9529078045. The cubic root of 72147236 is about 416.3001485871.

The spelling of 72147236 in words is "seventy-two million, one hundred forty-seven thousand, two hundred thirty-six".