406731530 has 16 divisors (see below), whose sum is σ = 744119784. Its totient is φ = 160025280.

The previous prime is 406731529. The next prime is 406731547. The reversal of 406731530 is 35137604.

It can be written as a sum of positive squares in 4 ways, for example, as 164275489 + 242456041 = 12817^2 + 15571^2 .

It is a super-2 number, since 2×406731530² = 330861074992281800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 406731493 and 406731502.

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, 332777 + ... + 333996.

Almost surely, 2^406731530 is an apocalyptic number.

406731530 is a deficient number, since it is larger than the sum of its proper divisors (337388254).

406731530 is a wasteful number, since it uses less digits than its factorization.

406731530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666841.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 406731530 is about 20167.5861222904. The cubic root of 406731530 is about 740.9165232512.

The spelling of 406731530 in words is "four hundred six million, seven hundred thirty-one thousand, five hundred thirty".