285040739 has 16 divisors (see below), whose sum is σ = 301320000. Its totient is φ = 269243520.

The previous prime is 285040729. The next prime is 285040747. The reversal of 285040739 is 937040582.

It is a cyclic number.

It is not a de Polignac number, because 285040739 - 2²⁸ = 16605283 is a prime.

It is a super-2 number, since 2×285040739² = 162496445779332242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285040729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475562 + ... + 476160.

It is an arithmetic number, because the mean of its divisors is an integer number (18832500).

Almost surely, 2^285040739 is an apocalyptic number.

285040739 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

285040739 is a deficient number, since it is larger than the sum of its proper divisors (16279261).

285040739 is a wasteful number, since it uses less digits than its factorization.

285040739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 285040739 is about 16883.1495580653. The cubic root of 285040739 is about 658.1157914066.

The spelling of 285040739 in words is "two hundred eighty-five million, forty thousand, seven hundred thirty-nine".