428387526 has 24 divisors (see below), whose sum is σ = 1060769424. Its totient is φ = 122396400.

The previous prime is 428387503. The next prime is 428387551. The reversal of 428387526 is 625783824.

428387526 is a `hidden beast` number, since 42 + 8 + 3 + 87 + 526 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1699825 + ... + 1700076.

It is an arithmetic number, because the mean of its divisors is an integer number (44198726).

Almost surely, 2^428387526 is an apocalyptic number.

428387526 is an abundant number, since it is smaller than the sum of its proper divisors (632381898).

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

428387526 is a wasteful number, since it uses less digits than its factorization.

428387526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399916 (or 3399913 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 428387526 is about 20697.5246346030. The cubic root of 428387526 is about 753.8395845768.

It can be divided in two parts, 4283 and 87526, that added together give a square (91809 = 303²).

The spelling of 428387526 in words is "four hundred twenty-eight million, three hundred eighty-seven thousand, five hundred twenty-six".