428392102 has 4 divisors (see below), whose sum is σ = 642588156. Its totient is φ = 214196050.

The previous prime is 428392091. The next prime is 428392103. The reversal of 428392102 is 201293824.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428392103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107098024 + ... + 107098027.

It is an arithmetic number, because the mean of its divisors is an integer number (160647039).

Almost surely, 2^428392102 is an apocalyptic number.

428392102 is a deficient number, since it is larger than the sum of its proper divisors (214196054).

428392102 is a wasteful number, since it uses less digits than its factorization.

428392102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214196053.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 428392102 is about 20697.6351789281. The cubic root of 428392102 is about 753.8422687179.

The spelling of 428392102 in words is "four hundred twenty-eight million, three hundred ninety-two thousand, one hundred two".