1238778760 has 16 divisors (see below), whose sum is σ = 2787252300. Its totient is φ = 495511488.

The previous prime is 1238778757. The next prime is 1238778767. The reversal of 1238778760 is 678778321.

It can be written as a sum of positive squares in 2 ways, for example, as 1134207684 + 104571076 = 33678^2 + 10226^2 .

It is not an unprimeable number, because it can be changed into a prime (1238778767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15484695 + ... + 15484774.

Almost surely, 2^1238778760 is an apocalyptic number.

1238778760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1238778760 is an abundant number, since it is smaller than the sum of its proper divisors (1548473540).

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

1238778760 is a wasteful number, since it uses less digits than its factorization.

1238778760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30969480 (or 30969476 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 1238778760 is about 35196.2890089282. The cubic root of 1238778760 is about 1073.9842606758.

The spelling of 1238778760 in words is "one billion, two hundred thirty-eight million, seven hundred seventy-eight thousand, seven hundred sixty".