288778140 has 72 divisors (see below), whose sum is σ = 1001101920. Its totient is φ = 66006144.

The previous prime is 288778123. The next prime is 288778141. The reversal of 288778140 is 41877882.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288778141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113335 + ... + 115854.

Almost surely, 2^288778140 is an apocalyptic number.

288778140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

288778140 is an abundant number, since it is smaller than the sum of its proper divisors (712323780).

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

288778140 is a wasteful number, since it uses less digits than its factorization.

288778140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229211 (or 229206 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 288778140 is about 16993.4734530643. The cubic root of 288778140 is about 660.9796745718.

The spelling of 288778140 in words is "two hundred eighty-eight million, seven hundred seventy-eight thousand, one hundred forty".