28322220025 has 12 divisors (see below), whose sum is σ = 38312239824. Its totient is φ = 20597978000.

The previous prime is 28322220023. The next prime is 28322220049. The reversal of 28322220025 is 52002222382.

It is not a de Polignac number, because 28322220025 - 2¹ = 28322220023 is a prime.

It is a super-2 number, since 2×28322220025² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28322219975 and 28322220002.

It is not an unprimeable number, because it can be changed into a prime (28322220023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51494671 + ... + 51495220.

It is an arithmetic number, because the mean of its divisors is an integer number (3192686652).

Almost surely, 2^28322220025 is an apocalyptic number.

28322220025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28322220025 is a deficient number, since it is larger than the sum of its proper divisors (9990019799).

28322220025 is a wasteful number, since it uses less digits than its factorization.

28322220025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102989912 (or 102989907 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The spelling of 28322220025 in words is "twenty-eight billion, three hundred twenty-two million, two hundred twenty thousand, twenty-five".