285137040 has 40 divisors (see below), whose sum is σ = 883925568. Its totient is φ = 76036480.

The previous prime is 285136993. The next prime is 285137071. The reversal of 285137040 is 40731582.

It is a tau number, because it is divible by the number of its divisors (40).

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 = 285136989 and 285137007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593796 + ... + 594275.

Almost surely, 2^285137040 is an apocalyptic number.

285137040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285137040 is an abundant number, since it is smaller than the sum of its proper divisors (598788528).

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

285137040 is a wasteful number, since it uses less digits than its factorization.

285137040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188087 (or 1188081 counting only the distinct ones).

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

The square root of 285137040 is about 16886.0013028544. The cubic root of 285137040 is about 658.1898978578.

It can be divided in two parts, 28513 and 7040, that added together give a palindrome (35553).

The spelling of 285137040 in words is "two hundred eighty-five million, one hundred thirty-seven thousand, forty".