428724038 has 4 divisors (see below), whose sum is σ = 643086060. Its totient is φ = 214362018.

The previous prime is 428724029. The next prime is 428724041. The reversal of 428724038 is 830427824.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 428723992 and 428724010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107181008 + ... + 107181011.

It is an arithmetic number, because the mean of its divisors is an integer number (160771515).

Almost surely, 2^428724038 is an apocalyptic number.

428724038 is a deficient number, since it is larger than the sum of its proper divisors (214362022).

428724038 is a wasteful number, since it uses less digits than its factorization.

428724038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214362021.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 428724038 is about 20705.6523200792. The cubic root of 428724038 is about 754.0369212221.

The spelling of 428724038 in words is "four hundred twenty-eight million, seven hundred twenty-four thousand, thirty-eight".