434391890 has 8 divisors (see below), whose sum is σ = 781905420. Its totient is φ = 173756752.

The previous prime is 434391863. The next prime is 434391901. The reversal of 434391890 is 98193434.

It can be written as a sum of positive squares in 2 ways, for example, as 420783169 + 13608721 = 20513^2 + 3689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21719585 + ... + 21719604.

Almost surely, 2^434391890 is an apocalyptic number.

434391890 is a deficient number, since it is larger than the sum of its proper divisors (347513530).

434391890 is a wasteful number, since it uses less digits than its factorization.

434391890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43439196.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 434391890 is about 20842.0701946808. The cubic root of 434391890 is about 757.3452446298.

The spelling of 434391890 in words is "four hundred thirty-four million, three hundred ninety-one thousand, eight hundred ninety".