428522015 has 16 divisors (see below), whose sum is σ = 524028960. Its totient is φ = 336307200.

The previous prime is 428521997. The next prime is 428522027. The reversal of 428522015 is 510225824.

It is not a de Polignac number, because 428522015 - 2⁸ = 428521759 is a prime.

It is a super-2 number, since 2×428522015² = 367262234679320450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176087 + ... + 178503.

It is an arithmetic number, because the mean of its divisors is an integer number (32751810).

Almost surely, 2^428522015 is an apocalyptic number.

428522015 is a deficient number, since it is larger than the sum of its proper divisors (95506945).

428522015 is a wasteful number, since it uses less digits than its factorization.

428522015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 428522015 is about 20700.7732947347. The cubic root of 428522015 is about 753.9184637210.

Adding to 428522015 its reverse (510225824), we get a palindrome (938747839).

The spelling of 428522015 in words is "four hundred twenty-eight million, five hundred twenty-two thousand, fifteen".