428214138 has 32 divisors (see below), whose sum is σ = 974909952. Its totient is φ = 124119600.

The previous prime is 428214119. The next prime is 428214179. The reversal of 428214138 is 831412824.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 428214099 and 428214108.

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, 139528 + ... + 142563.

It is an arithmetic number, because the mean of its divisors is an integer number (30465936).

Almost surely, 2^428214138 is an apocalyptic number.

428214138 is an abundant number, since it is smaller than the sum of its proper divisors (546695814).

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

428214138 is a wasteful number, since it uses less digits than its factorization.

428214138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282130.

The product of its digits is 12288, while the sum is 33.

The square root of 428214138 is about 20693.3355938573. The cubic root of 428214138 is about 753.7378664141.

The spelling of 428214138 in words is "four hundred twenty-eight million, two hundred fourteen thousand, one hundred thirty-eight".