428646040 has 16 divisors (see below), whose sum is σ = 964453680. Its totient is φ = 171458400.

The previous prime is 428645981. The next prime is 428646047. The reversal of 428646040 is 40646824.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 428645987 and 428646005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428646047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5358036 + ... + 5358115.

It is an arithmetic number, because the mean of its divisors is an integer number (60278355).

Almost surely, 2^428646040 is an apocalyptic number.

428646040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428646040 is an abundant number, since it is smaller than the sum of its proper divisors (535807640).

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

428646040 is a wasteful number, since it uses less digits than its factorization.

428646040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10716162 (or 10716158 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 428646040 is about 20703.7687390485. The cubic root of 428646040 is about 753.9911909981.

The spelling of 428646040 in words is "four hundred twenty-eight million, six hundred forty-six thousand, forty".