1378447954 has 16 divisors (see below), whose sum is σ = 2227339800. Its totient is φ = 636030720.

The previous prime is 1378447951. The next prime is 1378447969. The reversal of 1378447954 is 4597448731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1378265625 + 182329 = 37125^2 + 427^2 .

It is a super-2 number, since 2×1378447954² = 3800237523773572232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1378447951) 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 7 ways as a sum of consecutive naturals, for example, 163564 + ... + 171784.

Almost surely, 2^1378447954 is an apocalyptic number.

1378447954 is a deficient number, since it is larger than the sum of its proper divisors (848891846).

1378447954 is a wasteful number, since it uses less digits than its factorization.

1378447954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14685.

The product of its digits is 3386880, while the sum is 52.

The square root of 1378447954 is about 37127.4555282206. The cubic root of 1378447954 is about 1112.9187459367.

The spelling of 1378447954 in words is "one billion, three hundred seventy-eight million, four hundred forty-seven thousand, nine hundred fifty-four".