28400925826787 has 2 divisors, whose sum is σ = 28400925826788. Its totient is φ = 28400925826786.

The previous prime is 28400925826783. The next prime is 28400925826907. The reversal of 28400925826787 is 78762852900482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28400925826787 - 2² = 28400925826783 is a prime.

It is a super-2 number, since 2×28400925826787² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28400925826783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14200462913393 + 14200462913394.

It is an arithmetic number, because the mean of its divisors is an integer number (14200462913394).

Almost surely, 2^{28400925826787} is an apocalyptic number.

28400925826787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28400925826787 is an equidigital number, since it uses as much as digits as its factorization.

28400925826787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216760320, while the sum is 68.

The spelling of 28400925826787 in words is "twenty-eight trillion, four hundred billion, nine hundred twenty-five million, eight hundred twenty-six thousand, seven hundred eighty-seven".