1650705428 has 24 divisors (see below), whose sum is σ = 2992467240. Its totient is φ = 796167680.

The previous prime is 1650705373. The next prime is 1650705437. The reversal of 1650705428 is 8245070561.

It can be written as a sum of positive squares in 4 ways, for example, as 3319684 + 1647385744 = 1822^2 + 40588^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1650705391 and 1650705400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41951 + ... + 71142.

It is an arithmetic number, because the mean of its divisors is an integer number (124686135).

Almost surely, 2^1650705428 is an apocalyptic number.

It is an amenable number.

1650705428 is a deficient number, since it is larger than the sum of its proper divisors (1341761812).

1650705428 is a wasteful number, since it uses less digits than its factorization.

1650705428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113227 (or 113225 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 1650705428 is about 40628.8743137193. The cubic root of 1650705428 is about 1181.8341264960.

Adding to 1650705428 its reverse (8245070561), we get a palindrome (9895775989).

The spelling of 1650705428 in words is "one billion, six hundred fifty million, seven hundred five thousand, four hundred twenty-eight".