428140715 has 4 divisors (see below), whose sum is σ = 513768864. Its totient is φ = 342512568.

The previous prime is 428140709. The next prime is 428140747. The reversal of 428140715 is 517041824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428140715 - 2⁶ = 428140651 is a prime.

It is a super-2 number, since 2×428140715² = 366608943681422450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42814067 + ... + 42814076.

It is an arithmetic number, because the mean of its divisors is an integer number (128442216).

Almost surely, 2^428140715 is an apocalyptic number.

428140715 is a deficient number, since it is larger than the sum of its proper divisors (85628149).

428140715 is an equidigital number, since it uses as much as digits as its factorization.

428140715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85628148.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 428140715 is about 20691.5614442217. The cubic root of 428140715 is about 753.6947844965.

The spelling of 428140715 in words is "four hundred twenty-eight million, one hundred forty thousand, seven hundred fifteen".