641431090 has 16 divisors (see below), whose sum is σ = 1179142272. Its totient is φ = 251113264.

The previous prime is 641431031. The next prime is 641431117. The reversal of 641431090 is 90134146.

It is a super-2 number, since 2×641431090² = 822867686437176200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681904 + ... + 682843.

It is an arithmetic number, because the mean of its divisors is an integer number (73696392).

Almost surely, 2^641431090 is an apocalyptic number.

641431090 is a deficient number, since it is larger than the sum of its proper divisors (537711182).

641431090 is a wasteful number, since it uses less digits than its factorization.

641431090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364801.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 641431090 is about 25326.4898870728. The cubic root of 641431090 is about 862.4157290766.

The spelling of 641431090 in words is "six hundred forty-one million, four hundred thirty-one thousand, ninety".