428192427 has 18 divisors (see below), whose sum is σ = 618892092. Its totient is φ = 263216304.

The previous prime is 428192423. The next prime is 428192467. The reversal of 428192427 is 724291824.

It is a happy number.

It is not a de Polignac number, because 428192427 - 2² = 428192423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (428192423) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 465474 + ... + 466392.

It is an arithmetic number, because the mean of its divisors is an integer number (34382894).

Almost surely, 2^428192427 is an apocalyptic number.

428192427 is a deficient number, since it is larger than the sum of its proper divisors (190699665).

428192427 is an frugal number, since it uses more digits than its factorization.

428192427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867 (or 935 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 428192427 is about 20692.8109980254. The cubic root of 428192427 is about 753.7251277102.

The spelling of 428192427 in words is "four hundred twenty-eight million, one hundred ninety-two thousand, four hundred twenty-seven".