1549394268 has 12 divisors (see below), whose sum is σ = 3615253320. Its totient is φ = 516464752.

The previous prime is 1549394261. The next prime is 1549394269. The reversal of 1549394268 is 8624939451.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1549394268² = 4801245195422511648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1549394268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1549394261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64558083 + ... + 64558106.

It is an arithmetic number, because the mean of its divisors is an integer number (301271110).

Almost surely, 2^1549394268 is an apocalyptic number.

It is an amenable number.

1549394268 is an abundant number, since it is smaller than the sum of its proper divisors (2065859052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1549394268 is a wasteful number, since it uses less digits than its factorization.

1549394268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129116196 (or 129116194 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The square root of 1549394268 is about 39362.3458142423. The cubic root of 1549394268 is about 1157.1437527112.

The spelling of 1549394268 in words is "one billion, five hundred forty-nine million, three hundred ninety-four thousand, two hundred sixty-eight".