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28797779788 = 227199444947
BaseRepresentation
bin11010110100011110…
…110011111101001100
32202022222002210021121
4122310132303331030
5432434212423123
621121324210324
72036431042441
oct326436637514
982288083247
1028797779788
1111238661208
1256b83999a4
13293c2a41ab
1415728db9c8
15b3830075d
hex6b47b3f4c

28797779788 has 6 divisors (see below), whose sum is σ = 50396114636. Its totient is φ = 14398889892.

The previous prime is 28797779749. The next prime is 28797779789. The reversal of 28797779788 is 88797779782.

It is not an unprimeable number, because it can be changed into a prime (28797779789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3599722470 + ... + 3599722477.

Almost surely, 228797779788 is an apocalyptic number.

It is an amenable number.

28797779788 is a deficient number, since it is larger than the sum of its proper divisors (21598334848).

28797779788 is a wasteful number, since it uses less digits than its factorization.

28797779788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7199444951 (or 7199444949 counting only the distinct ones).

The product of its digits is 1394039808, while the sum is 79.

The spelling of 28797779788 in words is "twenty-eight billion, seven hundred ninety-seven million, seven hundred seventy-nine thousand, seven hundred eighty-eight".

Divisors: 1 2 4 7199444947 14398889894 28797779788