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28950014487 = 3191313877061
BaseRepresentation
bin11010111101100011…
…100010101000010111
32202201120120010000210
4122331203202220113
5433242200430422
621144403140503
72043260030412
oct327543425027
982646503023
1028950014487
111130658a409
12573b374733
1329649a62b4
141588c08b79
15b4687210c
hex6bd8e2a17

28950014487 has 16 divisors (see below), whose sum is σ = 40941774720. Its totient is φ = 18144640800.

The previous prime is 28950014477. The next prime is 28950014491. The reversal of 28950014487 is 78441005982.

It is a happy number.

It is not a de Polignac number, because 28950014487 - 215 = 28949981719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28950014447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1931064 + ... + 1945997.

It is an arithmetic number, because the mean of its divisors is an integer number (2558860920).

Almost surely, 228950014487 is an apocalyptic number.

28950014487 is a deficient number, since it is larger than the sum of its proper divisors (11991760233).

28950014487 is a wasteful number, since it uses less digits than its factorization.

28950014487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877214.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 28950014487 in words is "twenty-eight billion, nine hundred fifty million, fourteen thousand, four hundred eighty-seven".

Divisors: 1 3 19 57 131 393 2489 7467 3877061 11631183 73664159 220992477 507894991 1523684973 9650004829 28950014487