641450340 has 120 divisors (see below), whose sum is σ = 2025156672. Its totient is φ = 169957440.

The previous prime is 641450291. The next prime is 641450353. The reversal of 641450340 is 43054146.

It is a super-2 number, since 2×641450340² = 822917077372231200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 269355 + ... + 271725.

Almost surely, 2^641450340 is an apocalyptic number.

641450340 is a gapful number since it is divisible by the number (60) 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 641450340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012578336).

641450340 is an abundant number, since it is smaller than the sum of its proper divisors (1383706332).

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

641450340 is a wasteful number, since it uses less digits than its factorization.

641450340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559 (or 2548 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 641450340 is about 25326.8699210937. The cubic root of 641450340 is about 862.4243563150.

The spelling of 641450340 in words is "six hundred forty-one million, four hundred fifty thousand, three hundred forty".