1286145378 has 80 divisors (see below), whose sum is σ = 3467027520. Its totient is φ = 348123744.

The previous prime is 1286145337. The next prime is 1286145401. The reversal of 1286145378 is 8735416821.

1286145378 is a `hidden beast` number, since 1 + 28 + 614 + 5 + 3 + 7 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8301 + ... + 51392.

It is an arithmetic number, because the mean of its divisors is an integer number (43337844).

Almost surely, 2^1286145378 is an apocalyptic number.

1286145378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1286145378 is an abundant number, since it is smaller than the sum of its proper divisors (2180882142).

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

1286145378 is a wasteful number, since it uses less digits than its factorization.

1286145378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59733 (or 59724 counting only the distinct ones).

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

The square root of 1286145378 is about 35862.8690709486. The cubic root of 1286145378 is about 1087.5018901275.

The spelling of 1286145378 in words is "one billion, two hundred eighty-six million, one hundred forty-five thousand, three hundred seventy-eight".