1249352388 has 18 divisors (see below), whose sum is σ = 3158085294. Its totient is φ = 416450784.

The previous prime is 1249352381. The next prime is 1249352413. The reversal of 1249352388 is 8832539421.

1249352388 is a `hidden beast` number, since 1 + 2 + 49 + 3 + 523 + 88 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1232852544 + 16499844 = 35112^2 + 4062^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (1249352381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17352081 + ... + 17352152.

It is an arithmetic number, because the mean of its divisors is an integer number (175449183).

Almost surely, 2^1249352388 is an apocalyptic number.

1249352388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1249352388 is an abundant number, since it is smaller than the sum of its proper divisors (1908732906).

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

1249352388 is a wasteful number, since it uses less digits than its factorization.

1249352388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34704243 (or 34704238 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 1249352388 is about 35346.1792560384. The cubic root of 1249352388 is about 1077.0312811785.

The spelling of 1249352388 in words is "one billion, two hundred forty-nine million, three hundred fifty-two thousand, three hundred eighty-eight".