1378497546 has 12 divisors (see below), whose sum is σ = 2986744722. Its totient is φ = 459499176.

The previous prime is 1378497521. The next prime is 1378497599. The reversal of 1378497546 is 6457948731.

1378497546 is a `hidden beast` number, since 1 + 3 + 7 + 8 + 4 + 97 + 546 = 666.

It can be written as a sum of positive squares in only one way, i.e., 782600625 + 595896921 = 27975^2 + 24411^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1378497492 and 1378497501.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 38291581 + ... + 38291616.

Almost surely, 2^1378497546 is an apocalyptic number.

1378497546 is an abundant number, since it is smaller than the sum of its proper divisors (1608247176).

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

1378497546 is a wasteful number, since it uses less digits than its factorization.

1378497546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76583205 (or 76583202 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 1378497546 is about 37128.1233837640. The cubic root of 1378497546 is about 1112.9320921556.

The spelling of 1378497546 in words is "one billion, three hundred seventy-eight million, four hundred ninety-seven thousand, five hundred forty-six".