285390480 has 40 divisors (see below), whose sum is σ = 884711232. Its totient is φ = 76104064.

The previous prime is 285390473. The next prime is 285390487. The reversal of 285390480 is 84093582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (285390473) and next prime (285390487).

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

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (285390487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594324 + ... + 594803.

Almost surely, 2^285390480 is an apocalyptic number.

285390480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285390480 is an abundant number, since it is smaller than the sum of its proper divisors (599320752).

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

285390480 is a wasteful number, since it uses less digits than its factorization.

285390480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189143 (or 1189137 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 285390480 is about 16893.5040770114. The cubic root of 285390480 is about 658.3848476843.

The spelling of 285390480 in words is "two hundred eighty-five million, three hundred ninety thousand, four hundred eighty".