1285607838 has 8 divisors (see below), whose sum is σ = 2571215688. Its totient is φ = 428535944.

The previous prime is 1285607837. The next prime is 1285607857. The reversal of 1285607838 is 8387065821.

It is a sphenic number, since it is the product of 3 distinct primes.

1285607838 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285607837) 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, 107133981 + ... + 107133992.

It is an arithmetic number, because the mean of its divisors is an integer number (321401961).

Almost surely, 2^1285607838 is an apocalyptic number.

1285607838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1285607838 is a wasteful number, since it uses less digits than its factorization.

1285607838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214267978.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 1285607838 is about 35855.3739068497. The cubic root of 1285607838 is about 1087.3503631344.

The spelling of 1285607838 in words is "one billion, two hundred eighty-five million, six hundred seven thousand, eight hundred thirty-eight".