1387083278 has 24 divisors (see below), whose sum is σ = 2562693552. Its totient is φ = 559495104.

The previous prime is 1387083233. The next prime is 1387083349. The reversal of 1387083278 is 8723807831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414626 + ... + 417957.

It is an arithmetic number, because the mean of its divisors is an integer number (106778898).

Almost surely, 2^1387083278 is an apocalyptic number.

1387083278 is a deficient number, since it is larger than the sum of its proper divisors (1175610274).

1387083278 is a wasteful number, since it uses less digits than its factorization.

1387083278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832616 (or 832609 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 1387083278 is about 37243.5669344385. The cubic root of 1387083278 is about 1115.2378796286.

The spelling of 1387083278 in words is "one billion, three hundred eighty-seven million, eighty-three thousand, two hundred seventy-eight".