4428390555 has 32 divisors (see below), whose sum is σ = 7878726720. Its totient is φ = 2359998720.

The previous prime is 4428390541. The next prime is 4428390569. The reversal of 4428390555 is 5550938244.

4428390555 is a `hidden beast` number, since 4 + 4 + 2 + 8 + 3 + 90 + 555 = 666.

It is an interprime number because it is at equal distance from previous prime (4428390541) and next prime (4428390569).

It is not a de Polignac number, because 4428390555 - 2⁴ = 4428390539 is a prime.

It is a super-2 number, since 2×4428390555² = 39221285815226416050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 4428390555.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174559 + ... + 198311.

It is an arithmetic number, because the mean of its divisors is an integer number (246210210).

Almost surely, 2^4428390555 is an apocalyptic number.

4428390555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

4428390555 is a deficient number, since it is larger than the sum of its proper divisors (3450336165).

4428390555 is a wasteful number, since it uses less digits than its factorization.

4428390555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25148 (or 25142 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The square root of 4428390555 is about 66546.1535702853. The cubic root of 4428390555 is about 1642.1593797541.

The spelling of 4428390555 in words is "four billion, four hundred twenty-eight million, three hundred ninety thousand, five hundred fifty-five".