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428365831 is a prime number
BaseRepresentation
bin11001100010000…
…101100000000111
31002212001020110011
4121202011200013
51334130201311
6110301211051
713421022655
oct3142054007
91085036404
10428365831
111aa88a653
12bb560a87
136a99380a
1440c69dd5
1527918321
hex19885807

428365831 has 2 divisors, whose sum is σ = 428365832. Its totient is φ = 428365830.

The previous prime is 428365789. The next prime is 428365841. The reversal of 428365831 is 138563824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428365831 - 213 = 428357639 is a prime.

It is a super-2 number, since 2×4283658312 = 366994570336641122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428365841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214182915 + 214182916.

It is an arithmetic number, because the mean of its divisors is an integer number (214182916).

Almost surely, 2428365831 is an apocalyptic number.

428365831 is a deficient number, since it is larger than the sum of its proper divisors (1).

428365831 is an equidigital number, since it uses as much as digits as its factorization.

428365831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 40.

The square root of 428365831 is about 20697.0005314780. Note that the first 3 decimals coincide. The cubic root of 428365831 is about 753.8268586959.

The spelling of 428365831 in words is "four hundred twenty-eight million, three hundred sixty-five thousand, eight hundred thirty-one".