25780072 has 16 divisors (see below), whose sum is σ = 50004900. Its totient is φ = 12445440.

The previous prime is 25780063. The next prime is 25780087. The reversal of 25780072 is 27008752.

It can be written as a sum of positive squares in 2 ways, for example, as 25745476 + 34596 = 5074^2 + 186^2 .

It is a super-2 number, since 2×25780072² = 1329224224650368, which contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 55329 + ... + 55792.

Almost surely, 2^25780072 is an apocalyptic number.

It is an amenable number.

25780072 is a deficient number, since it is larger than the sum of its proper divisors (24224828).

25780072 is a wasteful number, since it uses less digits than its factorization.

25780072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111156 (or 111152 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 25780072 is about 5077.4080001513. The cubic root of 25780072 is about 295.4119381471.

The spelling of 25780072 in words is "twenty-five million, seven hundred eighty thousand, seventy-two".