1285794940 has 12 divisors (see below), whose sum is σ = 2700169416. Its totient is φ = 514317968.

The previous prime is 1285794929. The next prime is 1285794941. The reversal of 1285794940 is 494975821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285794941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32144854 + ... + 32144893.

It is an arithmetic number, because the mean of its divisors is an integer number (225014118).

Almost surely, 2^1285794940 is an apocalyptic number.

1285794940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285794940 is an abundant number, since it is smaller than the sum of its proper divisors (1414374476).

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

1285794940 is a wasteful number, since it uses less digits than its factorization.

1285794940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64289756 (or 64289754 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 1285794940 is about 35857.9829326748. The cubic root of 1285794940 is about 1087.4031100538.

The spelling of 1285794940 in words is "one billion, two hundred eighty-five million, seven hundred ninety-four thousand, nine hundred forty".