1378614825 has 144 divisors (see below), whose sum is σ = 3101230080. Its totient is φ = 570810240.

The previous prime is 1378614799. The next prime is 1378614829. The reversal of 1378614825 is 5284168731.

1378614825 is a `hidden beast` number, since 1 + 3 + 7 + 8 + 614 + 8 + 25 = 666.

It is not a de Polignac number, because 1378614825 - 2⁶ = 1378614761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1378614829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 687274 + ... + 689276.

It is an arithmetic number, because the mean of its divisors is an integer number (21536320).

Almost surely, 2^1378614825 is an apocalyptic number.

1378614825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378614825 is an abundant number, since it is smaller than the sum of its proper divisors (1722615255).

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

1378614825 is a wasteful number, since it uses less digits than its factorization.

1378614825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 2060 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 1378614825 is about 37129.7027324486. The cubic root of 1378614825 is about 1112.9636530537.

The spelling of 1378614825 in words is "one billion, three hundred seventy-eight million, six hundred fourteen thousand, eight hundred twenty-five".