1625420228 has 12 divisors (see below), whose sum is σ = 2866199952. Its totient is φ = 806505960.

The previous prime is 1625420191. The next prime is 1625420239. The reversal of 1625420228 is 8220245261.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1625420194 and 1625420203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550450 + ... + 1551497.

It is an arithmetic number, because the mean of its divisors is an integer number (238849996).

Almost surely, 2^1625420228 is an apocalyptic number.

It is an amenable number.

1625420228 is a deficient number, since it is larger than the sum of its proper divisors (1240779724).

1625420228 is a wasteful number, since it uses less digits than its factorization.

1625420228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102082 (or 3102080 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 1625420228 is about 40316.5006914043. The cubic root of 1625420228 is about 1175.7686783743.

Adding to 1625420228 its reverse (8220245261), we get a palindrome (9845665489).

The spelling of 1625420228 in words is "one billion, six hundred twenty-five million, four hundred twenty thousand, two hundred twenty-eight".