641270770 has 48 divisors (see below), whose sum is σ = 1401393600. Its totient is φ = 206924544.

The previous prime is 641270759. The next prime is 641270771. The reversal of 641270770 is 77072146.

It is a super-2 number, since 2×641270770² = 822456400912785800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641270771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4381 + ... + 36079.

It is an arithmetic number, because the mean of its divisors is an integer number (29195700).

Almost surely, 2^641270770 is an apocalyptic number.

641270770 is an abundant number, since it is smaller than the sum of its proper divisors (760122830).

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

641270770 is a wasteful number, since it uses less digits than its factorization.

641270770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31747 (or 31730 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 641270770 is about 25323.3246237535. The cubic root of 641270770 is about 862.3438720408.

The spelling of 641270770 in words is "six hundred forty-one million, two hundred seventy thousand, seven hundred seventy".