428218377 has 4 divisors (see below), whose sum is σ = 570957840. Its totient is φ = 285478916.

The previous prime is 428218339. The next prime is 428218477. The reversal of 428218377 is 773812824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428218377 - 2²⁸ = 159782921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428218327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71369727 + ... + 71369732.

It is an arithmetic number, because the mean of its divisors is an integer number (142739460).

Almost surely, 2^428218377 is an apocalyptic number.

It is an amenable number.

428218377 is a deficient number, since it is larger than the sum of its proper divisors (142739463).

428218377 is a wasteful number, since it uses less digits than its factorization.

428218377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142739462.

The product of its digits is 150528, while the sum is 42.

The square root of 428218377 is about 20693.4380178838. The cubic root of 428218377 is about 753.7403535532.

The spelling of 428218377 in words is "four hundred twenty-eight million, two hundred eighteen thousand, three hundred seventy-seven".