1286368940 has 12 divisors (see below), whose sum is σ = 2701374816. Its totient is φ = 514547568.

The previous prime is 1286368933. The next prime is 1286368961. The reversal of 1286368940 is 498636821.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32159204 + ... + 32159243.

It is an arithmetic number, because the mean of its divisors is an integer number (225114568).

Almost surely, 2^1286368940 is an apocalyptic number.

1286368940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1286368940 is an abundant number, since it is smaller than the sum of its proper divisors (1415005876).

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

1286368940 is a wasteful number, since it uses less digits than its factorization.

1286368940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64318456 (or 64318454 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 1286368940 is about 35865.9858361652. The cubic root of 1286368940 is about 1087.5648975232.

The spelling of 1286368940 in words is "one billion, two hundred eighty-six million, three hundred sixty-eight thousand, nine hundred forty".