428528751 has 32 divisors (see below), whose sum is σ = 675053568. Its totient is φ = 236730720.

The previous prime is 428528701. The next prime is 428528753. The reversal of 428528751 is 157825824.

428528751 = 246² + 247² + ... + 1091².

It is not a de Polignac number, because 428528751 - 2¹⁷ = 428397679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428528753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79306 + ... + 84536.

It is an arithmetic number, because the mean of its divisors is an integer number (21095424).

Almost surely, 2^428528751 is an apocalyptic number.

428528751 is a deficient number, since it is larger than the sum of its proper divisors (246524817).

428528751 is a wasteful number, since it uses less digits than its factorization.

428528751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5371.

The product of its digits is 179200, while the sum is 42.

The square root of 428528751 is about 20700.9359933313. The cubic root of 428528751 is about 753.9224140183.

The spelling of 428528751 in words is "four hundred twenty-eight million, five hundred twenty-eight thousand, seven hundred fifty-one".