4029649 has 8 divisors (see below), whose sum is σ = 4356072. Its totient is φ = 3705600.

The previous prime is 4029631. The next prime is 4029661. The reversal of 4029649 is 9469204.

It can be written as a sum of positive squares in 4 ways, for example, as 297025 + 3732624 = 545^2 + 1932^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4029649 - 2⁵ = 4029617 is a prime.

It is a Duffinian number.

4029649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4029679) 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, 4827 + ... + 5599.

It is an arithmetic number, because the mean of its divisors is an integer number (544509).

Almost surely, 2^4029649 is an apocalyptic number.

It is an amenable number.

4029649 is a deficient number, since it is larger than the sum of its proper divisors (326423).

4029649 is a wasteful number, since it uses less digits than its factorization.

4029649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 4029649 is about 2007.3985653078. The cubic root of 4029649 is about 159.1313472368.

The spelling of 4029649 in words is "four million, twenty-nine thousand, six hundred forty-nine".