1290757828 has 12 divisors (see below), whose sum is σ = 2267617212. Its totient is φ = 642867200.

The previous prime is 1290757807. The next prime is 1290757829. The reversal of 1290757828 is 8287570921.

It can be written as a sum of positive squares in 2 ways, for example, as 1014932164 + 275825664 = 31858^2 + 16608^2 .

It is not an unprimeable number, because it can be changed into a prime (1290757829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626773 + ... + 628828.

It is an arithmetic number, because the mean of its divisors is an integer number (188968101).

Almost surely, 2^1290757828 is an apocalyptic number.

It is an amenable number.

1290757828 is a deficient number, since it is larger than the sum of its proper divisors (976859384).

1290757828 is a wasteful number, since it uses less digits than its factorization.

1290757828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255862 (or 1255860 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 1290757828 is about 35927.1182813206. The cubic root of 1290757828 is about 1088.8003601696.

The spelling of 1290757828 in words is "one billion, two hundred ninety million, seven hundred fifty-seven thousand, eight hundred twenty-eight".