428155944 has 16 divisors (see below), whose sum is σ = 1070389920. Its totient is φ = 142718640.

The previous prime is 428155943. The next prime is 428155967. The reversal of 428155944 is 449551824.

It is a super-2 number, since 2×428155944² = 366635024765062272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 428155896 and 428155905.

It is not an unprimeable number, because it can be changed into a prime (428155943) 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, 8919892 + ... + 8919939.

It is an arithmetic number, because the mean of its divisors is an integer number (66899370).

Almost surely, 2^428155944 is an apocalyptic number.

It is an amenable number.

428155944 is an abundant number, since it is smaller than the sum of its proper divisors (642233976).

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

428155944 is a wasteful number, since it uses less digits than its factorization.

428155944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17839840 (or 17839836 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 428155944 is about 20691.9294412097. The cubic root of 428155944 is about 753.7037207188.

The spelling of 428155944 in words is "four hundred twenty-eight million, one hundred fifty-five thousand, nine hundred forty-four".