428026725 has 72 divisors (see below), whose sum is σ = 879765120. Its totient is φ = 194866560.

The previous prime is 428026723. The next prime is 428026727. The reversal of 428026725 is 527620824.

It is an interprime number because it is at equal distance from previous prime (428026723) and next prime (428026727).

It is not a de Polignac number, because 428026725 - 2¹ = 428026723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428026725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428026723) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 565047 + ... + 565803.

It is an arithmetic number, because the mean of its divisors is an integer number (12218960).

Almost surely, 2^428026725 is an apocalyptic number.

428026725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

428026725 is an abundant number, since it is smaller than the sum of its proper divisors (451738395).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428026725 is a wasteful number, since it uses less digits than its factorization.

428026725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 428026725 is about 20688.8067563115. The cubic root of 428026725 is about 753.6278895939.

The spelling of 428026725 in words is "four hundred twenty-eight million, twenty-six thousand, seven hundred twenty-five".