428922549 has 48 divisors (see below), whose sum is σ = 728133120. Its totient is φ = 240498720.

The previous prime is 428922547. The next prime is 428922551. The reversal of 428922549 is 945229824.

428922549 is a `hidden beast` number, since 4 + 2 + 89 + 22 + 549 = 666.

It is an interprime number because it is at equal distance from previous prime (428922547) and next prime (428922551).

It is not a de Polignac number, because 428922549 - 2¹ = 428922547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428922547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78232 + ... + 83534.

It is an arithmetic number, because the mean of its divisors is an integer number (15169440).

Almost surely, 2^428922549 is an apocalyptic number.

It is an amenable number.

428922549 is a deficient number, since it is larger than the sum of its proper divisors (299210571).

428922549 is a wasteful number, since it uses less digits than its factorization.

428922549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5382 (or 5379 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 428922549 is about 20710.4454080544. The cubic root of 428922549 is about 754.1532831964.

The spelling of 428922549 in words is "four hundred twenty-eight million, nine hundred twenty-two thousand, five hundred forty-nine".