72202946 has 4 divisors (see below), whose sum is σ = 108304422. Its totient is φ = 36101472.

The previous prime is 72202943. The next prime is 72202967. The reversal of 72202946 is 64920227.

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., 37687321 + 34515625 = 6139^2 + 5875^2 .

It is a super-2 number, since 2×72202946² = 10426530822157832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72202943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18050735 + ... + 18050738.

Almost surely, 2^72202946 is an apocalyptic number.

72202946 is a deficient number, since it is larger than the sum of its proper divisors (36101476).

72202946 is a wasteful number, since it uses less digits than its factorization.

72202946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36101475.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 72202946 is about 8497.2316668430. The cubic root of 72202946 is about 416.4072726467.

The spelling of 72202946 in words is "seventy-two million, two hundred two thousand, nine hundred forty-six".