285173040 has 160 divisors (see below), whose sum is σ = 920316096. Its totient is φ = 72990720.

The previous prime is 285172969. The next prime is 285173051. The reversal of 285173040 is 40371582.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 285172989 and 285173007.

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, 718122 + ... + 718518.

Almost surely, 2^285173040 is an apocalyptic number.

285173040 is a gapful number since it is divisible by the number (20) 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 285173040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460158048).

285173040 is an abundant number, since it is smaller than the sum of its proper divisors (635143056).

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

285173040 is a wasteful number, since it uses less digits than its factorization.

285173040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 285173040 is about 16887.0672409391. The cubic root of 285173040 is about 658.2175966317.

The spelling of 285173040 in words is "two hundred eighty-five million, one hundred seventy-three thousand, forty".