72775322 has 4 divisors (see below), whose sum is σ = 109162986. Its totient is φ = 36387660.

The previous prime is 72775303. The next prime is 72775327. The reversal of 72775322 is 22357727.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 69538921 + 3236401 = 8339^2 + 1799^2 .

It is not an unprimeable number, because it can be changed into a prime (72775327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18193829 + ... + 18193832.

Almost surely, 2^72775322 is an apocalyptic number.

72775322 is a deficient number, since it is larger than the sum of its proper divisors (36387664).

72775322 is a wasteful number, since it uses less digits than its factorization.

72775322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36387663.

The product of its digits is 41160, while the sum is 35.

The square root of 72775322 is about 8530.8453273987. The cubic root of 72775322 is about 417.5047093305.

The spelling of 72775322 in words is "seventy-two million, seven hundred seventy-five thousand, three hundred twenty-two".