72880025 has 6 divisors (see below), whose sum is σ = 90371262. Its totient is φ = 58304000.

The previous prime is 72879979. The next prime is 72880057. The reversal of 72880025 is 52008827.

It can be written as a sum of positive squares in 3 ways, for example, as 7722841 + 65157184 = 2779^2 + 8072^2 .

It is not a de Polignac number, because 72880025 - 2²⁰ = 71831449 is a prime.

It is a super-2 number, since 2×72880025² = 10622996088001250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72879973 and 72880000.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1457576 + ... + 1457625.

It is an arithmetic number, because the mean of its divisors is an integer number (15061877).

Almost surely, 2^72880025 is an apocalyptic number.

It is an amenable number.

72880025 is a deficient number, since it is larger than the sum of its proper divisors (17491237).

72880025 is a wasteful number, since it uses less digits than its factorization.

72880025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915211 (or 2915206 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 72880025 is about 8536.9798523834. The cubic root of 72880025 is about 417.7048369155.

The spelling of 72880025 in words is "seventy-two million, eight hundred eighty thousand, twenty-five".