3499428021 has 16 divisors (see below), whose sum is σ = 4810882560. Its totient is φ = 2261291760.

The previous prime is 3499428017. The next prime is 3499428047. The reversal of 3499428021 is 1208249943.

It is not a de Polignac number, because 3499428021 - 2² = 3499428017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3499428011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86641 + ... + 120438.

It is an arithmetic number, because the mean of its divisors is an integer number (300680160).

Almost surely, 2^3499428021 is an apocalyptic number.

It is an amenable number.

3499428021 is a deficient number, since it is larger than the sum of its proper divisors (1311454539).

3499428021 is a wasteful number, since it uses less digits than its factorization.

3499428021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207256.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 3499428021 is about 59155.9635286249. The cubic root of 3499428021 is about 1518.2117735690.

The spelling of 3499428021 in words is "three billion, four hundred ninety-nine million, four hundred twenty-eight thousand, twenty-one".