303542640 has 200 divisors, whose sum is σ = 1064983920. Its totient is φ = 80123904.

The previous prime is 303542621. The next prime is 303542641. The reversal of 303542640 is 46245303.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303542641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 900552 + ... + 900888.

Almost surely, 2^303542640 is an apocalyptic number.

303542640 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 303542640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532491960).

303542640 is an abundant number, since it is smaller than the sum of its proper divisors (761441280).

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

303542640 is a wasteful number, since it uses less digits than its factorization.

303542640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 303542640 is about 17422.4751398876. The cubic root of 303542640 is about 672.0577118803.

Adding to 303542640 its reverse (46245303), we get a palindrome (349787943).

The spelling of 303542640 in words is "three hundred three million, five hundred forty-two thousand, six hundred forty".