1550208428 has 12 divisors (see below), whose sum is σ = 2713146072. Its totient is φ = 775023840.

The previous prime is 1550208419. The next prime is 1550208493. The reversal of 1550208428 is 8248020551.

It is a happy number.

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, 52208 + ... + 76328.

It is an arithmetic number, because the mean of its divisors is an integer number (226095506).

Almost surely, 2^1550208428 is an apocalyptic number.

It is an amenable number.

1550208428 is a deficient number, since it is larger than the sum of its proper divisors (1162937644).

1550208428 is a wasteful number, since it uses less digits than its factorization.

1550208428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40192 (or 40190 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 1550208428 is about 39372.6863193255. The cubic root of 1550208428 is about 1157.3463986119.

Adding to 1550208428 its reverse (8248020551), we get a palindrome (9798228979).

The spelling of 1550208428 in words is "one billion, five hundred fifty million, two hundred eight thousand, four hundred twenty-eight".