439747690 has 16 divisors (see below), whose sum is σ = 792168840. Its totient is φ = 175760640.

The previous prime is 439747681. The next prime is 439747697. The reversal of 439747690 is 96747934.

It can be written as a sum of positive squares in 4 ways, for example, as 334048729 + 105698961 = 18277^2 + 10281^2 .

It is a super-2 number, since 2×439747690² = 386756061720672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (439747697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3435 + ... + 29854.

Almost surely, 2^439747690 is an apocalyptic number.

439747690 is a deficient number, since it is larger than the sum of its proper divisors (352421150).

439747690 is a wasteful number, since it uses less digits than its factorization.

439747690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34617.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The square root of 439747690 is about 20970.1618973245. The cubic root of 439747690 is about 760.4450820915.

The spelling of 439747690 in words is "four hundred thirty-nine million, seven hundred forty-seven thousand, six hundred ninety".