28226957425 has 24 divisors (see below), whose sum is σ = 35431850520. Its totient is φ = 22304409600.

The previous prime is 28226957387. The next prime is 28226957477. The reversal of 28226957425 is 52475962282.

It can be written as a sum of positive squares in 12 ways, for example, as 1007237169 + 27219720256 = 31737^2 + 164984^2 .

It is not a de Polignac number, because 28226957425 - 2⁹ = 28226956913 is a prime.

It is a super-2 number, since 2×28226957425² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2292285 + ... + 2304565.

It is an arithmetic number, because the mean of its divisors is an integer number (1476327105).

Almost surely, 2^28226957425 is an apocalyptic number.

28226957425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28226957425 is a deficient number, since it is larger than the sum of its proper divisors (7204893095).

28226957425 is a wasteful number, since it uses less digits than its factorization.

28226957425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13413 (or 13408 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 52.

The spelling of 28226957425 in words is "twenty-eight billion, two hundred twenty-six million, nine hundred fifty-seven thousand, four hundred twenty-five".