428299388 has 24 divisors (see below), whose sum is σ = 825766704. Its totient is φ = 192752000.

The previous prime is 428299381. The next prime is 428299397. The reversal of 428299388 is 883992824.

It is a super-2 number, since 2×428299388² = 366880731522349088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428299381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43745 + ... + 52632.

It is an arithmetic number, because the mean of its divisors is an integer number (34406946).

Almost surely, 2^428299388 is an apocalyptic number.

It is an amenable number.

428299388 is a deficient number, since it is larger than the sum of its proper divisors (397467316).

428299388 is a wasteful number, since it uses less digits than its factorization.

428299388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96493 (or 96491 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The square root of 428299388 is about 20695.3953332619. The cubic root of 428299388 is about 753.7878818027.

The spelling of 428299388 in words is "four hundred twenty-eight million, two hundred ninety-nine thousand, three hundred eighty-eight".