641287488 has 28 divisors (see below), whose sum is σ = 1696740320. Its totient is φ = 213762432.

The previous prime is 641287463. The next prime is 641287489. The reversal of 641287488 is 884782146.

It is a super-2 number, since 2×641287488² = 822499284530700288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641287489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1669828 + ... + 1670211.

Almost surely, 2^641287488 is an apocalyptic number.

It is an amenable number.

641287488 is an abundant number, since it is smaller than the sum of its proper divisors (1055452832).

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

641287488 is a wasteful number, since it uses less digits than its factorization.

641287488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340054 (or 3340044 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The square root of 641287488 is about 25323.6547125410. The cubic root of 641287488 is about 862.3513657758.

The spelling of 641287488 in words is "six hundred forty-one million, two hundred eighty-seven thousand, four hundred eighty-eight".