302640240 has 160 divisors (see below), whose sum is σ = 1080216576. Its totient is φ = 68659200.

The previous prime is 302640211. The next prime is 302640241. The reversal of 302640240 is 42046203.

It is a super-2 number, since 2×302640240² = 183182229734515200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302640241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253084 + ... + 254276.

Almost surely, 2^302640240 is an apocalyptic number.

302640240 is a gapful number since it is divisible by the number (30) 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 302640240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540108288).

302640240 is an abundant number, since it is smaller than the sum of its proper divisors (777576336).

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

302640240 is a wasteful number, since it uses less digits than its factorization.

302640240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 302640240 is about 17396.5582803036. The cubic root of 302640240 is about 671.3910654425.

Adding to 302640240 its reverse (42046203), we get a palindrome (344686443).

The spelling of 302640240 in words is "three hundred two million, six hundred forty thousand, two hundred forty".