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28976079 = 3111396317
BaseRepresentation
bin110111010001…
…0001111001111
32000112010201010
41232202033033
524404213304
62513020303
7501202236
oct156421717
960463633
1028976079
11153a1180
129854693
136006c12
143bc3b1d
152825789
hex1ba23cf

28976079 has 16 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 17432160.

The previous prime is 28976029. The next prime is 28976089. The reversal of 28976079 is 97067982.

It is not a de Polignac number, because 28976079 - 28 = 28975823 is a prime.

It is a super-2 number, since 2×289760792 = 1679226308428482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28976029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1429 + ... + 7745.

It is an arithmetic number, because the mean of its divisors is an integer number (2653560).

Almost surely, 228976079 is an apocalyptic number.

28976079 is a deficient number, since it is larger than the sum of its proper divisors (13480881).

28976079 is a wasteful number, since it uses less digits than its factorization.

28976079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 28976079 is about 5382.9433398467. The cubic root of 28976079 is about 307.1471847442.

The spelling of 28976079 in words is "twenty-eight million, nine hundred seventy-six thousand, seventy-nine".

Divisors: 1 3 11 33 139 417 1529 4587 6317 18951 69487 208461 878063 2634189 9658693 28976079