641430798 has 32 divisors (see below), whose sum is σ = 1304836224. Its totient is φ = 210161952.

The previous prime is 641430793. The next prime is 641430809. The reversal of 641430798 is 897034146.

It is a super-2 number, since 2×641430798² = 822866937245833608, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641430793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218436 + ... + 221352.

It is an arithmetic number, because the mean of its divisors is an integer number (40776132).

Almost surely, 2^641430798 is an apocalyptic number.

641430798 is an abundant number, since it is smaller than the sum of its proper divisors (663405426).

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

641430798 is a wasteful number, since it uses less digits than its factorization.

641430798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 641430798 is about 25326.4841223570. The cubic root of 641430798 is about 862.4155982102.

The spelling of 641430798 in words is "six hundred forty-one million, four hundred thirty thousand, seven hundred ninety-eight".