406530490 has 8 divisors (see below), whose sum is σ = 731754900. Its totient is φ = 162612192.

The previous prime is 406530461. The next prime is 406530493. The reversal of 406530490 is 94035604.

It can be written as a sum of positive squares in 2 ways, for example, as 392158809 + 14371681 = 19803^2 + 3791^2 .

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

It is not an unprimeable number, because it can be changed into a prime (406530493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20326515 + ... + 20326534.

Almost surely, 2^406530490 is an apocalyptic number.

406530490 is a deficient number, since it is larger than the sum of its proper divisors (325224410).

406530490 is a wasteful number, since it uses less digits than its factorization.

406530490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40653056.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 406530490 is about 20162.6012706694. The cubic root of 406530490 is about 740.7944292774.

The spelling of 406530490 in words is "four hundred six million, five hundred thirty thousand, four hundred ninety".