285929970 has 64 divisors (see below), whose sum is σ = 731431296. Its totient is φ = 71285760.

The previous prime is 285929947. The next prime is 285929981. The reversal of 285929970 is 79929582.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 78285 + ... + 81855.

It is an arithmetic number, because the mean of its divisors is an integer number (11428614).

Almost surely, 2^285929970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285929970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365715648).

285929970 is an abundant number, since it is smaller than the sum of its proper divisors (445501326).

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

285929970 is a wasteful number, since it uses less digits than its factorization.

285929970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755.

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 285929970 is about 16909.4639181732. The cubic root of 285929970 is about 658.7994474319.

The spelling of 285929970 in words is "two hundred eighty-five million, nine hundred twenty-nine thousand, nine hundred seventy".