1378890140 has 24 divisors (see below), whose sum is σ = 2896530000. Its totient is φ = 551392128.

The previous prime is 1378890131. The next prime is 1378890143. The reversal of 1378890140 is 410988731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378890143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76736 + ... + 92984.

It is an arithmetic number, because the mean of its divisors is an integer number (120688750).

Almost surely, 2^1378890140 is an apocalyptic number.

1378890140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378890140 is an abundant number, since it is smaller than the sum of its proper divisors (1517639860).

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

1378890140 is a wasteful number, since it uses less digits than its factorization.

1378890140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20501 (or 20499 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1378890140 is about 37133.4100238586. The cubic root of 1378890140 is about 1113.0377359150.

The spelling of 1378890140 in words is "one billion, three hundred seventy-eight million, eight hundred ninety thousand, one hundred forty".