1149508638 has 32 divisors (see below), whose sum is σ = 2573125920. Its totient is φ = 380370240.

The previous prime is 1149508621. The next prime is 1149508663. The reversal of 1149508638 is 8368059411.

1149508638 is a `hidden beast` number, since 1 + 1 + 4 + 9 + 5 + 0 + 8 + 638 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1149508593 and 1149508602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70293 + ... + 85088.

It is an arithmetic number, because the mean of its divisors is an integer number (80410185).

Almost surely, 2^1149508638 is an apocalyptic number.

1149508638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1149508638 is an abundant number, since it is smaller than the sum of its proper divisors (1423617282).

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

1149508638 is a wasteful number, since it uses less digits than its factorization.

1149508638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155529 (or 155523 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1149508638 is about 33904.4044041478. The cubic root of 1149508638 is about 1047.5403160207.

The spelling of 1149508638 in words is "one billion, one hundred forty-nine million, five hundred eight thousand, six hundred thirty-eight".