1285385004 has 48 divisors (see below), whose sum is σ = 3339571200. Its totient is φ = 427549968.

The previous prime is 1285384993. The next prime is 1285385029. The reversal of 1285385004 is 4005835821.

It is a happy number.

1285385004 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1285385004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39309 + ... + 64155.

It is an arithmetic number, because the mean of its divisors is an integer number (69574400).

Almost surely, 2^1285385004 is an apocalyptic number.

It is an amenable number.

1285385004 is an abundant number, since it is smaller than the sum of its proper divisors (2054186196).

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

1285385004 is a wasteful number, since it uses less digits than its factorization.

1285385004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25339 (or 25331 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 1285385004 is about 35852.2663718767. The cubic root of 1285385004 is about 1087.2875361395.

The spelling of 1285385004 in words is "one billion, two hundred eighty-five million, three hundred eighty-five thousand, four".