1378890136 has 32 divisors (see below), whose sum is σ = 2843547840. Its totient is φ = 622867968.

The previous prime is 1378890131. The next prime is 1378890143. The reversal of 1378890136 is 6310988731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378890131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 136161 + ... + 145936.

It is an arithmetic number, because the mean of its divisors is an integer number (88860870).

Almost surely, 2^1378890136 is an apocalyptic number.

It is an amenable number.

1378890136 is an abundant number, since it is smaller than the sum of its proper divisors (1464657704).

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

1378890136 is a wasteful number, since it uses less digits than its factorization.

1378890136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282163 (or 282159 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1378890136 is about 37133.4099699987. The cubic root of 1378890136 is about 1113.0377348388.

The spelling of 1378890136 in words is "one billion, three hundred seventy-eight million, eight hundred ninety thousand, one hundred thirty-six".