428648025 has 24 divisors (see below), whose sum is σ = 763215040. Its totient is φ = 211026240.

The previous prime is 428648023. The next prime is 428648027. The reversal of 428648025 is 520846824.

It is an interprime number because it is at equal distance from previous prime (428648023) and next prime (428648027).

It is not a de Polignac number, because 428648025 - 2¹ = 428648023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (428648021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218845 + ... + 220794.

Almost surely, 2^428648025 is an apocalyptic number.

It is an amenable number.

428648025 is a deficient number, since it is larger than the sum of its proper divisors (334567015).

428648025 is a wasteful number, since it uses less digits than its factorization.

428648025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439665 (or 439660 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 428648025 is about 20703.8166771250. The cubic root of 428648025 is about 753.9923548723.

The spelling of 428648025 in words is "four hundred twenty-eight million, six hundred forty-eight thousand, twenty-five".