72102208 has 14 divisors (see below), whose sum is σ = 143077946. Its totient is φ = 36051072.

The previous prime is 72102203. The next prime is 72102211. The reversal of 72102208 is 80220127.

It can be written as a sum of positive squares in only one way, i.e., 45805824 + 26296384 = 6768^2 + 5128^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72102203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563235 + ... + 563362.

Almost surely, 2^72102208 is an apocalyptic number.

It is an amenable number.

72102208 is a deficient number, since it is larger than the sum of its proper divisors (70975738).

72102208 is a wasteful number, since it uses less digits than its factorization.

72102208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126609 (or 1126599 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 72102208 is about 8491.3019025353. The cubic root of 72102208 is about 416.2135245057.

The spelling of 72102208 in words is "seventy-two million, one hundred two thousand, two hundred eight".