1285366340 has 96 divisors (see below), whose sum is σ = 2941747200. Its totient is φ = 470171520.

The previous prime is 1285366301. The next prime is 1285366351. The reversal of 1285366340 is 436635821.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1285366294 and 1285366303.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1410485 + ... + 1411395.

It is an arithmetic number, because the mean of its divisors is an integer number (30643200).

Almost surely, 2^1285366340 is an apocalyptic number.

1285366340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285366340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470873600).

1285366340 is an abundant number, since it is smaller than the sum of its proper divisors (1656380860).

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

1285366340 is a wasteful number, since it uses less digits than its factorization.

1285366340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 1285366340 is about 35852.0060805529. The cubic root of 1285366340 is about 1087.2822735832.

The spelling of 1285366340 in words is "one billion, two hundred eighty-five million, three hundred sixty-six thousand, three hundred forty".