641240748 has 36 divisors (see below), whose sum is σ = 1716263640. Its totient is φ = 201173376.

The previous prime is 641240711. The next prime is 641240753. The reversal of 641240748 is 847042146.

641240748 is a `hidden beast` number, since 641 + 2 + 4 + 0 + 7 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×641240748² = 822379393791199008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523278 + ... + 524501.

It is an arithmetic number, because the mean of its divisors is an integer number (47673990).

Almost surely, 2^641240748 is an apocalyptic number.

641240748 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

641240748 is an abundant number, since it is smaller than the sum of its proper divisors (1075022892).

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

641240748 is a wasteful number, since it uses less digits than its factorization.

641240748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047806 (or 1047801 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 641240748 is about 25322.7318431484. The cubic root of 641240748 is about 862.3304145473.

The spelling of 641240748 in words is "six hundred forty-one million, two hundred forty thousand, seven hundred forty-eight".