1008257649 has 16 divisors (see below), whose sum is σ = 1551607680. Its totient is φ = 570441600.

The previous prime is 1008257633. The next prime is 1008257707. The reversal of 1008257649 is 9467528001.

It is not a de Polignac number, because 1008257649 - 2⁴ = 1008257633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1008257649.

It is not an unprimeable number, because it can be changed into a prime (1008257149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235564 + ... + 239805.

It is an arithmetic number, because the mean of its divisors is an integer number (96975480).

Almost surely, 2^1008257649 is an apocalyptic number.

It is an amenable number.

1008257649 is a deficient number, since it is larger than the sum of its proper divisors (543350031).

1008257649 is a wasteful number, since it uses less digits than its factorization.

1008257649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475480.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1008257649 is about 31753.0730638784. The cubic root of 1008257649 is about 1002.7450077048.

The spelling of 1008257649 in words is "one billion, eight million, two hundred fifty-seven thousand, six hundred forty-nine".