428170212 has 30 divisors (see below), whose sum is σ = 1119322358. Its totient is φ = 142723296.

The previous prime is 428170207. The next prime is 428170217. The reversal of 428170212 is 212071824.

It is an interprime number because it is at equal distance from previous prime (428170207) and next prime (428170217).

It can be written as a sum of positive squares in only one way, i.e., 226984356 + 201185856 = 15066^2 + 14184^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (428170217) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 660433 + ... + 661080.

Almost surely, 2^428170212 is an apocalyptic number.

It is an amenable number.

428170212 is an abundant number, since it is smaller than the sum of its proper divisors (691152146).

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

428170212 is a wasteful number, since it uses less digits than its factorization.

428170212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321529 (or 1321518 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 428170212 is about 20692.2742104390. The cubic root of 428170212 is about 753.7120928438.

The spelling of 428170212 in words is "four hundred twenty-eight million, one hundred seventy thousand, two hundred twelve".